72151640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{163981}}^1$

素因数の和:164003

約数の個数: 32

約数和(自身を含む): 177100560

約数和(自身を除く): 104948920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 163981, 327962, 655924, 819905, 1311848, 1639810, 1803791, 3279620, 3607582, 6559240, 7215164, 9018955, 14430328, 18037910, 36075820, 72151640]

約数ペア:

[(1, 72151640), (2, 36075820), (4, 18037910), (5, 14430328), (8, 9018955), (10, 7215164), (11, 6559240), (20, 3607582), (22, 3279620), (40, 1803791), (44, 1639810), (55, 1311848), (88, 819905), (110, 655924), (220, 327962), (440, 163981)]