21309140

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{2657}}^1$

素因数の和:3067

約数の個数: 24

約数和(自身を含む): 44877672

約数和(自身を除く): 23568532

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 2657, 4010, 5314, 8020, 10628, 13285, 26570, 53140, 1065457, 2130914, 4261828, 5327285, 10654570, 21309140]

約数ペア:

[(1, 21309140), (2, 10654570), (4, 5327285), (5, 4261828), (10, 2130914), (20, 1065457), (401, 53140), (802, 26570), (1604, 13285), (2005, 10628), (2657, 8020), (4010, 5314)]