20548580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4649}}^1$

素因数の和:4688

約数の個数: 48

約数和(自身を含む): 49215600

約数和(自身を除く): 28667020

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4649, 9298, 18596, 23245, 46490, 60437, 79033, 92980, 120874, 158066, 241748, 302185, 316132, 395165, 604370, 790330, 1027429, 1208740, 1580660, 2054858, 4109716, 5137145, 10274290, 20548580]

約数ペア:

[(1, 20548580), (2, 10274290), (4, 5137145), (5, 4109716), (10, 2054858), (13, 1580660), (17, 1208740), (20, 1027429), (26, 790330), (34, 604370), (52, 395165), (65, 316132), (68, 302185), (85, 241748), (130, 158066), (170, 120874), (221, 92980), (260, 79033), (340, 60437), (442, 46490), (884, 23245), (1105, 18596), (2210, 9298), (4420, 4649)]