21903885

素因数分解:

$3^3\times 5^1\times {\mathrm{162251}}^1$

素因数の和:162265

約数の個数: 16

約数和(自身を含む): 38940480

約数和(自身を除く): 17036595

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 162251, 486753, 811255, 1460259, 2433765, 4380777, 7301295, 21903885]

約数ペア:

[(1, 21903885), (3, 7301295), (5, 4380777), (9, 2433765), (15, 1460259), (27, 811255), (45, 486753), (135, 162251)]