21609740

素因数分解:

$2^2\times 5^1\times {\mathrm{191}}^1\times {\mathrm{5657}}^1$

素因数の和:5857

約数の個数: 24

約数和(自身を含む): 45626112

約数和(自身を除く): 24016372

約数列:

[1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910, 3820, 5657, 11314, 22628, 28285, 56570, 113140, 1080487, 2160974, 4321948, 5402435, 10804870, 21609740]

約数ペア:

[(1, 21609740), (2, 10804870), (4, 5402435), (5, 4321948), (10, 2160974), (20, 1080487), (191, 113140), (382, 56570), (764, 28285), (955, 22628), (1910, 11314), (3820, 5657)]