21066875

素因数分解:

$5^4\times {\mathrm{37}}^1\times {\mathrm{911}}^1$

素因数の和:968

約数の個数: 20

約数和(自身を含む): 27066336

約数和(自身を除く): 5999461

約数列:

[1, 5, 25, 37, 125, 185, 625, 911, 925, 4555, 4625, 22775, 23125, 33707, 113875, 168535, 569375, 842675, 4213375, 21066875]

約数ペア:

[(1, 21066875), (5, 4213375), (25, 842675), (37, 569375), (125, 168535), (185, 113875), (625, 33707), (911, 23125), (925, 22775), (4555, 4625)]