20997900

素因数分解:

$2^2\times 3^3\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1$

素因数の和:142

約数の個数: 288

約数和(自身を含む): 84994560

約数和(自身を除く): 63996660

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 18, 20, 21, 22, 25, 27, 28, 30, 33, 35, 36, 42, 44, 45, 50, 54, 55, 60, 63, 66, 70, 75, 77, 84, 90, 99, 100, 101, 105, 108, 110, 126, 132, 135, 140, 150, 154, 165, 175, 180, 189, 198, 202, 210, 220, 225, 231, 252, 270, 275, 297, 300, 303, 308, 315, 330, 350, 378, 385, 396, 404, 420, 450, 462, 495, 505, 525, 540, 550, 594, 606, 630, 660, 675, 693, 700, 707, 756, 770, 825, 900, 909, 924, 945, 990, 1010, 1050, 1100, 1111, 1155, 1188, 1212, 1260, 1350, 1386, 1414, 1485, 1515, 1540, 1575, 1650, 1818, 1890, 1925, 1980, 2020, 2079, 2100, 2121, 2222, 2310, 2475, 2525, 2700, 2727, 2772, 2828, 2970, 3030, 3150, 3300, 3333, 3465, 3535, 3636, 3780, 3850, 4158, 4242, 4444, 4545, 4620, 4725, 4950, 5050, 5454, 5555, 5775, 5940, 6060, 6300, 6363, 6666, 6930, 7070, 7425, 7575, 7700, 7777, 8316, 8484, 9090, 9450, 9900, 9999, 10100, 10395, 10605, 10908, 11110, 11550, 12726, 13332, 13635, 13860, 14140, 14850, 15150, 15554, 16665, 17325, 17675, 18180, 18900, 19089, 19998, 20790, 21210, 22220, 22725, 23100, 23331, 25452, 27270, 27775, 29700, 29997, 30300, 31108, 31815, 33330, 34650, 35350, 38178, 38885, 39996, 41580, 42420, 45450, 46662, 49995, 51975, 53025, 54540, 55550, 59994, 63630, 66660, 68175, 69300, 69993, 70700, 76356, 77770, 83325, 90900, 93324, 95445, 99990, 103950, 106050, 111100, 116655, 119988, 127260, 136350, 139986, 149985, 155540, 159075, 166650, 190890, 194425, 199980, 207900, 209979, 212100, 233310, 249975, 272700, 279972, 299970, 318150, 333300, 349965, 381780, 388850, 419958, 466620, 477225, 499950, 583275, 599940, 636300, 699930, 749925, 777700, 839916, 954450, 999900, 1049895, 1166550, 1399860, 1499850, 1749825, 1908900, 2099790, 2333100, 2999700, 3499650, 4199580, 5249475, 6999300, 10498950, 20997900]

約数ペア:

[(1, 20997900), (2, 10498950), (3, 6999300), (4, 5249475), (5, 4199580), (6, 3499650), (7, 2999700), (9, 2333100), (10, 2099790), (11, 1908900), (12, 1749825), (14, 1499850), (15, 1399860), (18, 1166550), (20, 1049895), (21, 999900), (22, 954450), (25, 839916), (27, 777700), (28, 749925), (30, 699930), (33, 636300), (35, 599940), (36, 583275), (42, 499950), (44, 477225), (45, 466620), (50, 419958), (54, 388850), (55, 381780), (60, 349965), (63, 333300), (66, 318150), (70, 299970), (75, 279972), (77, 272700), (84, 249975), (90, 233310), (99, 212100), (100, 209979), (101, 207900), (105, 199980), (108, 194425), (110, 190890), (126, 166650), (132, 159075), (135, 155540), (140, 149985), (150, 139986), (154, 136350), (165, 127260), (175, 119988), (180, 116655), (189, 111100), (198, 106050), (202, 103950), (210, 99990), (220, 95445), (225, 93324), (231, 90900), (252, 83325), (270, 77770), (275, 76356), (297, 70700), (300, 69993), (303, 69300), (308, 68175), (315, 66660), (330, 63630), (350, 59994), (378, 55550), (385, 54540), (396, 53025), (404, 51975), (420, 49995), (450, 46662), (462, 45450), (495, 42420), (505, 41580), (525, 39996), (540, 38885), (550, 38178), (594, 35350), (606, 34650), (630, 33330), (660, 31815), (675, 31108), (693, 30300), (700, 29997), (707, 29700), (756, 27775), (770, 27270), (825, 25452), (900, 23331), (909, 23100), (924, 22725), (945, 22220), (990, 21210), (1010, 20790), (1050, 19998), (1100, 19089), (1111, 18900), (1155, 18180), (1188, 17675), (1212, 17325), (1260, 16665), (1350, 15554), (1386, 15150), (1414, 14850), (1485, 14140), (1515, 13860), (1540, 13635), (1575, 13332), (1650, 12726), (1818, 11550), (1890, 11110), (1925, 10908), (1980, 10605), (2020, 10395), (2079, 10100), (2100, 9999), (2121, 9900), (2222, 9450), (2310, 9090), (2475, 8484), (2525, 8316), (2700, 7777), (2727, 7700), (2772, 7575), (2828, 7425), (2970, 7070), (3030, 6930), (3150, 6666), (3300, 6363), (3333, 6300), (3465, 6060), (3535, 5940), (3636, 5775), (3780, 5555), (3850, 5454), (4158, 5050), (4242, 4950), (4444, 4725), (4545, 4620)]