21427060

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{499}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 47880000

約数和(自身を除く): 26452940

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 113, 190, 226, 380, 452, 499, 565, 998, 1130, 1996, 2147, 2260, 2495, 4294, 4990, 8588, 9481, 9980, 10735, 18962, 21470, 37924, 42940, 47405, 56387, 94810, 112774, 189620, 225548, 281935, 563870, 1071353, 1127740, 2142706, 4285412, 5356765, 10713530, 21427060]

約数ペア:

[(1, 21427060), (2, 10713530), (4, 5356765), (5, 4285412), (10, 2142706), (19, 1127740), (20, 1071353), (38, 563870), (76, 281935), (95, 225548), (113, 189620), (190, 112774), (226, 94810), (380, 56387), (452, 47405), (499, 42940), (565, 37924), (998, 21470), (1130, 18962), (1996, 10735), (2147, 9980), (2260, 9481), (2495, 8588), (4294, 4990)]