21151240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{907}}^1$

素因数の和:982

約数の個数: 64

約数和(自身を含む): 52954560

約数和(自身を除く): 31803320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 53, 55, 88, 106, 110, 212, 220, 265, 424, 440, 530, 583, 907, 1060, 1166, 1814, 2120, 2332, 2915, 3628, 4535, 4664, 5830, 7256, 9070, 9977, 11660, 18140, 19954, 23320, 36280, 39908, 48071, 49885, 79816, 96142, 99770, 192284, 199540, 240355, 384568, 399080, 480710, 528781, 961420, 1057562, 1922840, 2115124, 2643905, 4230248, 5287810, 10575620, 21151240]

約数ペア:

[(1, 21151240), (2, 10575620), (4, 5287810), (5, 4230248), (8, 2643905), (10, 2115124), (11, 1922840), (20, 1057562), (22, 961420), (40, 528781), (44, 480710), (53, 399080), (55, 384568), (88, 240355), (106, 199540), (110, 192284), (212, 99770), (220, 96142), (265, 79816), (424, 49885), (440, 48071), (530, 39908), (583, 36280), (907, 23320), (1060, 19954), (1166, 18140), (1814, 11660), (2120, 9977), (2332, 9070), (2915, 7256), (3628, 5830), (4535, 4664)]