21017655

素因数分解:

$3^2\times 5^1\times {\mathrm{359}}^1\times {\mathrm{1301}}^1$

素因数の和:1671

約数の個数: 24

約数和(自身を含む): 36560160

約数和(自身を除く): 15542505

約数列:

[1, 3, 5, 9, 15, 45, 359, 1077, 1301, 1795, 3231, 3903, 5385, 6505, 11709, 16155, 19515, 58545, 467059, 1401177, 2335295, 4203531, 7005885, 21017655]

約数ペア:

[(1, 21017655), (3, 7005885), (5, 4203531), (9, 2335295), (15, 1401177), (45, 467059), (359, 58545), (1077, 19515), (1301, 16155), (1795, 11709), (3231, 6505), (3903, 5385)]