21820851

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{421}}^1\times {\mathrm{443}}^1$

素因数の和:883

約数の個数: 24

約数和(自身を含む): 34100976

約数和(自身を除く): 12280125

約数列:

[1, 3, 9, 13, 39, 117, 421, 443, 1263, 1329, 3789, 3987, 5473, 5759, 16419, 17277, 49257, 51831, 186503, 559509, 1678527, 2424539, 7273617, 21820851]

約数ペア:

[(1, 21820851), (3, 7273617), (9, 2424539), (13, 1678527), (39, 559509), (117, 186503), (421, 51831), (443, 49257), (1263, 17277), (1329, 16419), (3789, 5759), (3987, 5473)]