1278821240

素因数分解:

$2^3\times 5^1\times {\mathrm{31970531}}^1$

素因数の和:31970542

約数の個数: 16

約数和(自身を含む): 2877347880

約数和(自身を除く): 1598526640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 31970531, 63941062, 127882124, 159852655, 255764248, 319705310, 639410620, 1278821240]

約数ペア:

[(1, 1278821240), (2, 639410620), (4, 319705310), (5, 255764248), (8, 159852655), (10, 127882124), (20, 63941062), (40, 31970531)]