640443980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1471}}^1\times {\mathrm{1979}}^1$

素因数の和:3470

約数の個数: 48

約数和(自身を含む): 1468938240

約数和(自身を除く): 828494260

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 1471, 1979, 2942, 3958, 5884, 7355, 7916, 9895, 14710, 16181, 19790, 21769, 29420, 32362, 39580, 43538, 64724, 80905, 87076, 108845, 161810, 217690, 323620, 435380, 2911109, 5822218, 11644436, 14555545, 29111090, 32022199, 58222180, 64044398, 128088796, 160110995, 320221990, 640443980]

約数ペア:

[(1, 640443980), (2, 320221990), (4, 160110995), (5, 128088796), (10, 64044398), (11, 58222180), (20, 32022199), (22, 29111090), (44, 14555545), (55, 11644436), (110, 5822218), (220, 2911109), (1471, 435380), (1979, 323620), (2942, 217690), (3958, 161810), (5884, 108845), (7355, 87076), (7916, 80905), (9895, 64724), (14710, 43538), (16181, 39580), (19790, 32362), (21769, 29420)]