21288100

素因数分解:

$2^2\times 5^2\times {\mathrm{212881}}^1$

素因数の和:212895

約数の個数: 18

約数和(自身を含む): 46195394

約数和(自身を除く): 24907294

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 212881, 425762, 851524, 1064405, 2128810, 4257620, 5322025, 10644050, 21288100]

約数ペア:

[(1, 21288100), (2, 10644050), (4, 5322025), (5, 4257620), (10, 2128810), (20, 1064405), (25, 851524), (50, 425762), (100, 212881)]