156712720

素因数分解:

$2^4\times 5^1\times {\mathrm{1958909}}^1$

素因数の和:1958922

約数の個数: 20

約数和(自身を含む): 364357260

約数和(自身を除く): 207644540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1958909, 3917818, 7835636, 9794545, 15671272, 19589090, 31342544, 39178180, 78356360, 156712720]

約数ペア:

[(1, 156712720), (2, 78356360), (4, 39178180), (5, 31342544), (8, 19589090), (10, 15671272), (16, 9794545), (20, 7835636), (40, 3917818), (80, 1958909)]