811640

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{197}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 1853280

約数和(自身を除く): 1041640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 197, 206, 394, 412, 515, 788, 824, 985, 1030, 1576, 1970, 2060, 3940, 4120, 7880, 20291, 40582, 81164, 101455, 162328, 202910, 405820, 811640]

約数ペア:

[(1, 811640), (2, 405820), (4, 202910), (5, 162328), (8, 101455), (10, 81164), (20, 40582), (40, 20291), (103, 7880), (197, 4120), (206, 3940), (394, 2060), (412, 1970), (515, 1576), (788, 1030), (824, 985)]