210815620

素因数分解:

$2^2\times 5^1\times {\mathrm{10540781}}^1$

素因数の和:10540790

約数の個数: 12

約数和(自身を含む): 442712844

約数和(自身を除く): 231897224

約数列:

[1, 2, 4, 5, 10, 20, 10540781, 21081562, 42163124, 52703905, 105407810, 210815620]

約数ペア:

[(1, 210815620), (2, 105407810), (4, 52703905), (5, 42163124), (10, 21081562), (20, 10540781)]