78821240

素因数分解:

$2^3\times 5^1\times {\mathrm{1970531}}^1$

素因数の和:1970542

約数の個数: 16

約数和(自身を含む): 177347880

約数和(自身を除く): 98526640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1970531, 3941062, 7882124, 9852655, 15764248, 19705310, 39410620, 78821240]

約数ペア:

[(1, 78821240), (2, 39410620), (4, 19705310), (5, 15764248), (8, 9852655), (10, 7882124), (20, 3941062), (40, 1970531)]