21901867

素因数分解:

${\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:534

約数の個数: 16

約数和(自身を含む): 24373440

約数和(自身を除く): 2471573

約数列:

[1, 13, 61, 71, 389, 793, 923, 4331, 5057, 23729, 27619, 56303, 308477, 359047, 1684759, 21901867]

約数ペア:

[(1, 21901867), (13, 1684759), (61, 359047), (71, 308477), (389, 56303), (793, 27619), (923, 23729), (4331, 5057)]