21057580

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{14423}}^1$

素因数の和:14505

約数の個数: 24

約数和(自身を含む): 44829792

約数和(自身を除く): 23772212

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 14423, 28846, 57692, 72115, 144230, 288460, 1052879, 2105758, 4211516, 5264395, 10528790, 21057580]

約数ペア:

[(1, 21057580), (2, 10528790), (4, 5264395), (5, 4211516), (10, 2105758), (20, 1052879), (73, 288460), (146, 144230), (292, 72115), (365, 57692), (730, 28846), (1460, 14423)]