21118253

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{443}}^1$

素因数の和:668

約数の個数: 16

約数和(自身を含む): 24118080

約数和(自身を除く): 2999827

約数列:

[1, 13, 19, 193, 247, 443, 2509, 3667, 5759, 8417, 47671, 85499, 109421, 1111487, 1624481, 21118253]

約数ペア:

[(1, 21118253), (13, 1624481), (19, 1111487), (193, 109421), (247, 85499), (443, 47671), (2509, 8417), (3667, 5759)]