21678225

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{9967}}^1$

素因数の和:10009

約数の個数: 24

約数和(自身を含む): 37080960

約数和(自身を除く): 15402735

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 145, 435, 725, 2175, 9967, 29901, 49835, 149505, 249175, 289043, 747525, 867129, 1445215, 4335645, 7226075, 21678225]

約数ペア:

[(1, 21678225), (3, 7226075), (5, 4335645), (15, 1445215), (25, 867129), (29, 747525), (75, 289043), (87, 249175), (145, 149505), (435, 49835), (725, 29901), (2175, 9967)]