780654320

素因数分解:

$2^4\times 5^1\times {\mathrm{9758179}}^1$

素因数の和:9758192

約数の個数: 20

約数和(自身を含む): 1815021480

約数和(自身を除く): 1034367160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 9758179, 19516358, 39032716, 48790895, 78065432, 97581790, 156130864, 195163580, 390327160, 780654320]

約数ペア:

[(1, 780654320), (2, 390327160), (4, 195163580), (5, 156130864), (8, 97581790), (10, 78065432), (16, 48790895), (20, 39032716), (40, 19516358), (80, 9758179)]