21393021

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{787}}^1$

素因数の和:861

約数の個数: 32

約数和(自身を含む): 33360768

約数和(自身を除く): 11967747

約数列:

[1, 3, 13, 17, 39, 41, 51, 123, 221, 533, 663, 697, 787, 1599, 2091, 2361, 9061, 10231, 13379, 27183, 30693, 32267, 40137, 96801, 173927, 419471, 521781, 548539, 1258413, 1645617, 7131007, 21393021]

約数ペア:

[(1, 21393021), (3, 7131007), (13, 1645617), (17, 1258413), (39, 548539), (41, 521781), (51, 419471), (123, 173927), (221, 96801), (533, 40137), (663, 32267), (697, 30693), (787, 27183), (1599, 13379), (2091, 10231), (2361, 9061)]