21380458815

素因数分解:

$3^3\times 5^1\times {\mathrm{158373769}}^1$

素因数の和:158373783

約数の個数: 16

約数和(自身を含む): 38009704800

約数和(自身を除く): 16629245985

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 158373769, 475121307, 791868845, 1425363921, 2375606535, 4276091763, 7126819605, 21380458815]

約数ペア:

[(1, 21380458815), (3, 7126819605), (5, 4276091763), (9, 2375606535), (15, 1425363921), (27, 791868845), (45, 475121307), (135, 158373769)]