20902605

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{81971}}^1$

素因数の和:81996

約数の個数: 16

約数和(自身を含む): 35411904

約数和(自身を除く): 14509299

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 81971, 245913, 409855, 1229565, 1393507, 4180521, 6967535, 20902605]

約数ペア:

[(1, 20902605), (3, 6967535), (5, 4180521), (15, 1393507), (17, 1229565), (51, 409855), (85, 245913), (255, 81971)]