21553980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:148

約数の個数: 192

約数和(自身を含む): 75586560

約数和(自身を除く): 54032580

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 28, 30, 35, 37, 38, 42, 57, 60, 70, 73, 74, 76, 84, 95, 105, 111, 114, 133, 140, 146, 148, 185, 190, 210, 219, 222, 228, 259, 266, 285, 292, 365, 370, 380, 399, 420, 438, 444, 511, 518, 532, 555, 570, 665, 703, 730, 740, 777, 798, 876, 1022, 1036, 1095, 1110, 1140, 1295, 1330, 1387, 1406, 1460, 1533, 1554, 1596, 1995, 2044, 2109, 2190, 2220, 2555, 2590, 2660, 2701, 2774, 2812, 3066, 3108, 3515, 3885, 3990, 4161, 4218, 4380, 4921, 5110, 5180, 5402, 5548, 6132, 6935, 7030, 7665, 7770, 7980, 8103, 8322, 8436, 9709, 9842, 10220, 10545, 10804, 13505, 13870, 14060, 14763, 15330, 15540, 16206, 16644, 18907, 19418, 19684, 20805, 21090, 24605, 27010, 27740, 29127, 29526, 30660, 32412, 37814, 38836, 40515, 41610, 42180, 48545, 49210, 51319, 54020, 56721, 58254, 59052, 73815, 75628, 81030, 83220, 94535, 97090, 98420, 102638, 113442, 116508, 145635, 147630, 153957, 162060, 189070, 194180, 205276, 226884, 256595, 283605, 291270, 295260, 307914, 359233, 378140, 513190, 567210, 582540, 615828, 718466, 769785, 1026380, 1077699, 1134420, 1436932, 1539570, 1796165, 2155398, 3079140, 3592330, 4310796, 5388495, 7184660, 10776990, 21553980]

約数ペア:

[(1, 21553980), (2, 10776990), (3, 7184660), (4, 5388495), (5, 4310796), (6, 3592330), (7, 3079140), (10, 2155398), (12, 1796165), (14, 1539570), (15, 1436932), (19, 1134420), (20, 1077699), (21, 1026380), (28, 769785), (30, 718466), (35, 615828), (37, 582540), (38, 567210), (42, 513190), (57, 378140), (60, 359233), (70, 307914), (73, 295260), (74, 291270), (76, 283605), (84, 256595), (95, 226884), (105, 205276), (111, 194180), (114, 189070), (133, 162060), (140, 153957), (146, 147630), (148, 145635), (185, 116508), (190, 113442), (210, 102638), (219, 98420), (222, 97090), (228, 94535), (259, 83220), (266, 81030), (285, 75628), (292, 73815), (365, 59052), (370, 58254), (380, 56721), (399, 54020), (420, 51319), (438, 49210), (444, 48545), (511, 42180), (518, 41610), (532, 40515), (555, 38836), (570, 37814), (665, 32412), (703, 30660), (730, 29526), (740, 29127), (777, 27740), (798, 27010), (876, 24605), (1022, 21090), (1036, 20805), (1095, 19684), (1110, 19418), (1140, 18907), (1295, 16644), (1330, 16206), (1387, 15540), (1406, 15330), (1460, 14763), (1533, 14060), (1554, 13870), (1596, 13505), (1995, 10804), (2044, 10545), (2109, 10220), (2190, 9842), (2220, 9709), (2555, 8436), (2590, 8322), (2660, 8103), (2701, 7980), (2774, 7770), (2812, 7665), (3066, 7030), (3108, 6935), (3515, 6132), (3885, 5548), (3990, 5402), (4161, 5180), (4218, 5110), (4380, 4921)]