21129251

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1063}}^1$

素因数の和:1226

約数の個数: 16

約数和(自身を含む): 25025280

約数和(自身を除く): 3896029

約数列:

[1, 11, 13, 139, 143, 1063, 1529, 1807, 11693, 13819, 19877, 147757, 152009, 1625327, 1920841, 21129251]

約数ペア:

[(1, 21129251), (11, 1920841), (13, 1625327), (139, 152009), (143, 147757), (1063, 19877), (1529, 13819), (1807, 11693)]