647268520

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1\times {\mathrm{1609}}^1$

素因数の和:1822

約数の個数: 64

約数和(自身を含む): 1486674000

約数和(自身を除く): 839405480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 113, 178, 226, 356, 445, 452, 565, 712, 890, 904, 1130, 1609, 1780, 2260, 3218, 3560, 4520, 6436, 8045, 10057, 12872, 16090, 20114, 32180, 40228, 50285, 64360, 80456, 100570, 143201, 181817, 201140, 286402, 363634, 402280, 572804, 716005, 727268, 909085, 1145608, 1432010, 1454536, 1818170, 2864020, 3636340, 5728040, 7272680, 16181713, 32363426, 64726852, 80908565, 129453704, 161817130, 323634260, 647268520]

約数ペア:

[(1, 647268520), (2, 323634260), (4, 161817130), (5, 129453704), (8, 80908565), (10, 64726852), (20, 32363426), (40, 16181713), (89, 7272680), (113, 5728040), (178, 3636340), (226, 2864020), (356, 1818170), (445, 1454536), (452, 1432010), (565, 1145608), (712, 909085), (890, 727268), (904, 716005), (1130, 572804), (1609, 402280), (1780, 363634), (2260, 286402), (3218, 201140), (3560, 181817), (4520, 143201), (6436, 100570), (8045, 80456), (10057, 64360), (12872, 50285), (16090, 40228), (20114, 32180)]