21559868

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{3121}}^1$

素因数の和:3293

約数の個数: 24

約数和(自身を含む): 41435184

約数和(自身を除く): 19875316

約数列:

[1, 2, 4, 11, 22, 44, 157, 314, 628, 1727, 3121, 3454, 6242, 6908, 12484, 34331, 68662, 137324, 489997, 979994, 1959988, 5389967, 10779934, 21559868]

約数ペア:

[(1, 21559868), (2, 10779934), (4, 5389967), (11, 1959988), (22, 979994), (44, 489997), (157, 137324), (314, 68662), (628, 34331), (1727, 12484), (3121, 6908), (3454, 6242)]