21117579

素因数分解:

$3^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{1481}}^1$

素因数の和:1595

約数の個数: 24

約数和(自身を含む): 33113808

約数和(自身を除く): 11996229

約数列:

[1, 3, 7, 21, 49, 97, 147, 291, 679, 1481, 2037, 4443, 4753, 10367, 14259, 31101, 72569, 143657, 217707, 430971, 1005599, 3016797, 7039193, 21117579]

約数ペア:

[(1, 21117579), (3, 7039193), (7, 3016797), (21, 1005599), (49, 430971), (97, 217707), (147, 143657), (291, 72569), (679, 31101), (1481, 14259), (2037, 10367), (4443, 4753)]