21512620

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{7219}}^1$

素因数の和:7377

約数の個数: 24

約数和(自身を含む): 45486000

約数和(自身を除く): 23973380

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 596, 745, 1490, 2980, 7219, 14438, 28876, 36095, 72190, 144380, 1075631, 2151262, 4302524, 5378155, 10756310, 21512620]

約数ペア:

[(1, 21512620), (2, 10756310), (4, 5378155), (5, 4302524), (10, 2151262), (20, 1075631), (149, 144380), (298, 72190), (596, 36095), (745, 28876), (1490, 14438), (2980, 7219)]