21285100

素因数分解:

$2^2\times 5^2\times {\mathrm{212851}}^1$

素因数の和:212865

約数の個数: 18

約数和(自身を含む): 46188884

約数和(自身を除く): 24903784

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 212851, 425702, 851404, 1064255, 2128510, 4257020, 5321275, 10642550, 21285100]

約数ペア:

[(1, 21285100), (2, 10642550), (4, 5321275), (5, 4257020), (10, 2128510), (20, 1064255), (25, 851404), (50, 425702), (100, 212851)]