21213100

素因数分解:

$2^2\times 5^2\times {\mathrm{212131}}^1$

素因数の和:212145

約数の個数: 18

約数和(自身を含む): 46032644

約数和(自身を除く): 24819544

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 212131, 424262, 848524, 1060655, 2121310, 4242620, 5303275, 10606550, 21213100]

約数ペア:

[(1, 21213100), (2, 10606550), (4, 5303275), (5, 4242620), (10, 2121310), (20, 1060655), (25, 848524), (50, 424262), (100, 212131)]