20704720

素因数分解:

$2^4\times 5^1\times {\mathrm{258809}}^1$

素因数の和:258822

約数の個数: 20

約数和(自身を含む): 48138660

約数和(自身を除く): 27433940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258809, 517618, 1035236, 1294045, 2070472, 2588090, 4140944, 5176180, 10352360, 20704720]

約数ペア:

[(1, 20704720), (2, 10352360), (4, 5176180), (5, 4140944), (8, 2588090), (10, 2070472), (16, 1294045), (20, 1035236), (40, 517618), (80, 258809)]