64718440

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{191}}^1\times {\mathrm{197}}^1$

素因数の和:442

約数の個数: 64

約数和(自身を含む): 150543360

約数和(自身を除く): 85824920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 191, 197, 215, 344, 382, 394, 430, 764, 788, 860, 955, 985, 1528, 1576, 1720, 1910, 1970, 3820, 3940, 7640, 7880, 8213, 8471, 16426, 16942, 32852, 33884, 37627, 41065, 42355, 65704, 67768, 75254, 82130, 84710, 150508, 164260, 169420, 188135, 301016, 328520, 338840, 376270, 752540, 1505080, 1617961, 3235922, 6471844, 8089805, 12943688, 16179610, 32359220, 64718440]

約数ペア:

[(1, 64718440), (2, 32359220), (4, 16179610), (5, 12943688), (8, 8089805), (10, 6471844), (20, 3235922), (40, 1617961), (43, 1505080), (86, 752540), (172, 376270), (191, 338840), (197, 328520), (215, 301016), (344, 188135), (382, 169420), (394, 164260), (430, 150508), (764, 84710), (788, 82130), (860, 75254), (955, 67768), (985, 65704), (1528, 42355), (1576, 41065), (1720, 37627), (1910, 33884), (1970, 32852), (3820, 16942), (3940, 16426), (7640, 8471), (7880, 8213)]