21581040

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{6917}}^1$

素因数の和:6946

約数の個数: 80

約数和(自身を含む): 72057888

約数和(自身を除く): 50476848

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 65, 78, 80, 104, 120, 130, 156, 195, 208, 240, 260, 312, 390, 520, 624, 780, 1040, 1560, 3120, 6917, 13834, 20751, 27668, 34585, 41502, 55336, 69170, 83004, 89921, 103755, 110672, 138340, 166008, 179842, 207510, 269763, 276680, 332016, 359684, 415020, 449605, 539526, 553360, 719368, 830040, 899210, 1079052, 1348815, 1438736, 1660080, 1798420, 2158104, 2697630, 3596840, 4316208, 5395260, 7193680, 10790520, 21581040]

約数ペア:

[(1, 21581040), (2, 10790520), (3, 7193680), (4, 5395260), (5, 4316208), (6, 3596840), (8, 2697630), (10, 2158104), (12, 1798420), (13, 1660080), (15, 1438736), (16, 1348815), (20, 1079052), (24, 899210), (26, 830040), (30, 719368), (39, 553360), (40, 539526), (48, 449605), (52, 415020), (60, 359684), (65, 332016), (78, 276680), (80, 269763), (104, 207510), (120, 179842), (130, 166008), (156, 138340), (195, 110672), (208, 103755), (240, 89921), (260, 83004), (312, 69170), (390, 55336), (520, 41502), (624, 34585), (780, 27668), (1040, 20751), (1560, 13834), (3120, 6917)]