21125290

素因数分解:

$2^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19381}}^1$

素因数の和:19497

約数の個数: 16

約数和(自身を含む): 38376360

約数和(自身を除く): 17251070

約数列:

[1, 2, 5, 10, 109, 218, 545, 1090, 19381, 38762, 96905, 193810, 2112529, 4225058, 10562645, 21125290]

約数ペア:

[(1, 21125290), (2, 10562645), (5, 4225058), (10, 2112529), (109, 193810), (218, 96905), (545, 38762), (1090, 19381)]