20998588

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31063}}^1$

素因数の和:31093

約数の個数: 18

約数和(自身を含む): 39792984

約数和(自身を除く): 18794396

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 31063, 62126, 124252, 403819, 807638, 1615276, 5249647, 10499294, 20998588]

約数ペア:

[(1, 20998588), (2, 10499294), (4, 5249647), (13, 1615276), (26, 807638), (52, 403819), (169, 124252), (338, 62126), (676, 31063)]