21378225

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{25913}}^1$

素因数の和:25937

約数の個数: 24

約数和(自身を含む): 38560032

約数和(自身を除く): 17181807

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 165, 275, 825, 25913, 77739, 129565, 285043, 388695, 647825, 855129, 1425215, 1943475, 4275645, 7126075, 21378225]

約数ペア:

[(1, 21378225), (3, 7126075), (5, 4275645), (11, 1943475), (15, 1425215), (25, 855129), (33, 647825), (55, 388695), (75, 285043), (165, 129565), (275, 77739), (825, 25913)]