21379680

素因数分解:

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

素因数の和:139

約数の個数: 288

約数和(自身を含む): 87907680

約数和(自身を除く): 66528000

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 49, 54, 56, 60, 63, 70, 72, 80, 84, 90, 96, 98, 101, 105, 108, 112, 120, 126, 135, 140, 144, 147, 160, 168, 180, 189, 196, 202, 210, 216, 224, 240, 245, 252, 270, 280, 288, 294, 303, 315, 336, 360, 378, 392, 404, 420, 432, 441, 480, 490, 504, 505, 540, 560, 588, 606, 630, 672, 707, 720, 735, 756, 784, 808, 840, 864, 882, 909, 945, 980, 1008, 1010, 1080, 1120, 1176, 1212, 1260, 1323, 1414, 1440, 1470, 1512, 1515, 1568, 1616, 1680, 1764, 1818, 1890, 1960, 2016, 2020, 2121, 2160, 2205, 2352, 2424, 2520, 2646, 2727, 2828, 2940, 3024, 3030, 3232, 3360, 3528, 3535, 3636, 3780, 3920, 4040, 4242, 4320, 4410, 4545, 4704, 4848, 4949, 5040, 5292, 5454, 5656, 5880, 6048, 6060, 6363, 6615, 7056, 7070, 7272, 7560, 7840, 8080, 8484, 8820, 9090, 9696, 9898, 10080, 10584, 10605, 10908, 11312, 11760, 12120, 12726, 13230, 13635, 14112, 14140, 14544, 14847, 15120, 16160, 16968, 17640, 18180, 19089, 19796, 21168, 21210, 21816, 22624, 23520, 24240, 24745, 25452, 26460, 27270, 28280, 29088, 29694, 30240, 31815, 33936, 35280, 36360, 38178, 39592, 42336, 42420, 43632, 44541, 48480, 49490, 50904, 52920, 54540, 56560, 59388, 63630, 67872, 70560, 72720, 74235, 76356, 79184, 84840, 87264, 89082, 95445, 98980, 101808, 105840, 109080, 113120, 118776, 127260, 133623, 145440, 148470, 152712, 158368, 169680, 178164, 190890, 197960, 203616, 211680, 218160, 222705, 237552, 254520, 267246, 296940, 305424, 339360, 356328, 381780, 395920, 436320, 445410, 475104, 509040, 534492, 593880, 610848, 668115, 712656, 763560, 791840, 890820, 1018080, 1068984, 1187760, 1336230, 1425312, 1527120, 1781640, 2137968, 2375520, 2672460, 3054240, 3563280, 4275936, 5344920, 7126560, 10689840, 21379680]

約数ペア:

[(1, 21379680), (2, 10689840), (3, 7126560), (4, 5344920), (5, 4275936), (6, 3563280), (7, 3054240), (8, 2672460), (9, 2375520), (10, 2137968), (12, 1781640), (14, 1527120), (15, 1425312), (16, 1336230), (18, 1187760), (20, 1068984), (21, 1018080), (24, 890820), (27, 791840), (28, 763560), (30, 712656), (32, 668115), (35, 610848), (36, 593880), (40, 534492), (42, 509040), (45, 475104), (48, 445410), (49, 436320), (54, 395920), (56, 381780), (60, 356328), (63, 339360), (70, 305424), (72, 296940), (80, 267246), (84, 254520), (90, 237552), (96, 222705), (98, 218160), (101, 211680), (105, 203616), (108, 197960), (112, 190890), (120, 178164), (126, 169680), (135, 158368), (140, 152712), (144, 148470), (147, 145440), (160, 133623), (168, 127260), (180, 118776), (189, 113120), (196, 109080), (202, 105840), (210, 101808), (216, 98980), (224, 95445), (240, 89082), (245, 87264), (252, 84840), (270, 79184), (280, 76356), (288, 74235), (294, 72720), (303, 70560), (315, 67872), (336, 63630), (360, 59388), (378, 56560), (392, 54540), (404, 52920), (420, 50904), (432, 49490), (441, 48480), (480, 44541), (490, 43632), (504, 42420), (505, 42336), (540, 39592), (560, 38178), (588, 36360), (606, 35280), (630, 33936), (672, 31815), (707, 30240), (720, 29694), (735, 29088), (756, 28280), (784, 27270), (808, 26460), (840, 25452), (864, 24745), (882, 24240), (909, 23520), (945, 22624), (980, 21816), (1008, 21210), (1010, 21168), (1080, 19796), (1120, 19089), (1176, 18180), (1212, 17640), (1260, 16968), (1323, 16160), (1414, 15120), (1440, 14847), (1470, 14544), (1512, 14140), (1515, 14112), (1568, 13635), (1616, 13230), (1680, 12726), (1764, 12120), (1818, 11760), (1890, 11312), (1960, 10908), (2016, 10605), (2020, 10584), (2121, 10080), (2160, 9898), (2205, 9696), (2352, 9090), (2424, 8820), (2520, 8484), (2646, 8080), (2727, 7840), (2828, 7560), (2940, 7272), (3024, 7070), (3030, 7056), (3232, 6615), (3360, 6363), (3528, 6060), (3535, 6048), (3636, 5880), (3780, 5656), (3920, 5454), (4040, 5292), (4242, 5040), (4320, 4949), (4410, 4848), (4545, 4704)]