20454680

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6473}}^1$

素因数の和:6563

約数の個数: 32

約数和(自身を含む): 46612800

約数和(自身を除く): 26158120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6473, 12946, 25892, 32365, 51784, 64730, 129460, 258920, 511367, 1022734, 2045468, 2556835, 4090936, 5113670, 10227340, 20454680]

約数ペア:

[(1, 20454680), (2, 10227340), (4, 5113670), (5, 4090936), (8, 2556835), (10, 2045468), (20, 1022734), (40, 511367), (79, 258920), (158, 129460), (316, 64730), (395, 51784), (632, 32365), (790, 25892), (1580, 12946), (3160, 6473)]