21978020

素因数分解:

$2^2\times 5^1\times {\mathrm{769}}^1\times {\mathrm{1429}}^1$

素因数の和:2207

約数の個数: 24

約数和(自身を含む): 46246200

約数和(自身を除く): 24268180

約数列:

[1, 2, 4, 5, 10, 20, 769, 1429, 1538, 2858, 3076, 3845, 5716, 7145, 7690, 14290, 15380, 28580, 1098901, 2197802, 4395604, 5494505, 10989010, 21978020]

約数ペア:

[(1, 21978020), (2, 10989010), (4, 5494505), (5, 4395604), (10, 2197802), (20, 1098901), (769, 28580), (1429, 15380), (1538, 14290), (2858, 7690), (3076, 7145), (3845, 5716)]