25881980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{16381}}^1$

素因数の和:16469

約数の個数: 24

約数和(自身を含む): 55043520

約数和(自身を除く): 29161540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 16381, 32762, 65524, 81905, 163810, 327620, 1294099, 2588198, 5176396, 6470495, 12940990, 25881980]

約数ペア:

[(1, 25881980), (2, 12940990), (4, 6470495), (5, 5176396), (10, 2588198), (20, 1294099), (79, 327620), (158, 163810), (316, 81905), (395, 65524), (790, 32762), (1580, 16381)]