20711240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{457}}^1$

素因数の和:582

約数の個数: 64

約数和(自身を含む): 51442560

約数和(自身を除く): 30731320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 103, 110, 206, 220, 412, 440, 457, 515, 824, 914, 1030, 1133, 1828, 2060, 2266, 2285, 3656, 4120, 4532, 4570, 5027, 5665, 9064, 9140, 10054, 11330, 18280, 20108, 22660, 25135, 40216, 45320, 47071, 50270, 94142, 100540, 188284, 201080, 235355, 376568, 470710, 517781, 941420, 1035562, 1882840, 2071124, 2588905, 4142248, 5177810, 10355620, 20711240]

約数ペア:

[(1, 20711240), (2, 10355620), (4, 5177810), (5, 4142248), (8, 2588905), (10, 2071124), (11, 1882840), (20, 1035562), (22, 941420), (40, 517781), (44, 470710), (55, 376568), (88, 235355), (103, 201080), (110, 188284), (206, 100540), (220, 94142), (412, 50270), (440, 47071), (457, 45320), (515, 40216), (824, 25135), (914, 22660), (1030, 20108), (1133, 18280), (1828, 11330), (2060, 10054), (2266, 9140), (2285, 9064), (3656, 5665), (4120, 5027), (4532, 4570)]