64608620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{78791}}^1$

素因数の和:78841

約数の個数: 24

約数和(自身を含む): 138989088

約数和(自身を除く): 74380468

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 78791, 157582, 315164, 393955, 787910, 1575820, 3230431, 6460862, 12921724, 16152155, 32304310, 64608620]

約数ペア:

[(1, 64608620), (2, 32304310), (4, 16152155), (5, 12921724), (10, 6460862), (20, 3230431), (41, 1575820), (82, 787910), (164, 393955), (205, 315164), (410, 157582), (820, 78791)]