80628980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{51031}}^1$

素因数の和:51119

約数の個数: 24

約数和(自身を含む): 171467520

約数和(自身を除く): 90838540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 51031, 102062, 204124, 255155, 510310, 1020620, 4031449, 8062898, 16125796, 20157245, 40314490, 80628980]

約数ペア:

[(1, 80628980), (2, 40314490), (4, 20157245), (5, 16125796), (10, 8062898), (20, 4031449), (79, 1020620), (158, 510310), (316, 255155), (395, 204124), (790, 102062), (1580, 51031)]