20216721

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{20483}}^1$

素因数の和:20540

約数の個数: 16

約数和(自身を含む): 31463424

約数和(自身を除く): 11246703

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 20483, 61449, 143381, 430143, 962701, 2888103, 6738907, 20216721]

約数ペア:

[(1, 20216721), (3, 6738907), (7, 2888103), (21, 962701), (47, 430143), (141, 143381), (329, 61449), (987, 20483)]