81971905

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{509}}^1\times {\mathrm{1039}}^1$

素因数の和:1584

約数の個数: 16

約数和(自身を含む): 101836800

約数和(自身を除く): 19864895

約数列:

[1, 5, 31, 155, 509, 1039, 2545, 5195, 15779, 32209, 78895, 161045, 528851, 2644255, 16394381, 81971905]

約数ペア:

[(1, 81971905), (5, 16394381), (31, 2644255), (155, 528851), (509, 161045), (1039, 78895), (2545, 32209), (5195, 15779)]