21538959

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{8243}}^1$

素因数の和:8326

約数の個数: 16

約数和(自身を含む): 31393152

約数和(自身を除く): 9854193

約数列:

[1, 3, 13, 39, 67, 201, 871, 2613, 8243, 24729, 107159, 321477, 552281, 1656843, 7179653, 21538959]

約数ペア:

[(1, 21538959), (3, 7179653), (13, 1656843), (39, 552281), (67, 321477), (201, 107159), (871, 24729), (2613, 8243)]