21486020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15131}}^1$

素因数の和:15211

約数の個数: 24

約数和(自身を含む): 45759168

約数和(自身を除く): 24273148

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 15131, 30262, 60524, 75655, 151310, 302620, 1074301, 2148602, 4297204, 5371505, 10743010, 21486020]

約数ペア:

[(1, 21486020), (2, 10743010), (4, 5371505), (5, 4297204), (10, 2148602), (20, 1074301), (71, 302620), (142, 151310), (284, 75655), (355, 60524), (710, 30262), (1420, 15131)]