81415240

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{12487}}^1$

素因数の和:12661

約数の個数: 32

約数和(自身を含む): 184322880

約数和(自身を除く): 102907640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 12487, 24974, 49948, 62435, 99896, 124870, 249740, 499480, 2035381, 4070762, 8141524, 10176905, 16283048, 20353810, 40707620, 81415240]

約数ペア:

[(1, 81415240), (2, 40707620), (4, 20353810), (5, 16283048), (8, 10176905), (10, 8141524), (20, 4070762), (40, 2035381), (163, 499480), (326, 249740), (652, 124870), (815, 99896), (1304, 62435), (1630, 49948), (3260, 24974), (6520, 12487)]