78840780140

素因数分解:

$2^2\times 5^1\times {\mathrm{3942039007}}^1$

素因数の和:3942039016

約数の個数: 12

約数和(自身を含む): 165565638336

約数和(自身を除く): 86724858196

約数列:

[1, 2, 4, 5, 10, 20, 3942039007, 7884078014, 15768156028, 19710195035, 39420390070, 78840780140]

約数ペア:

[(1, 78840780140), (2, 39420390070), (4, 19710195035), (5, 15768156028), (10, 7884078014), (20, 3942039007)]