21078977

素因数分解:

${\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:320

約数の個数: 16

約数和(自身を含む): 22569984

約数和(自身を除く): 1491007

約数列:

[1, 31, 61, 71, 157, 1891, 2201, 4331, 4867, 9577, 11147, 134261, 296887, 345557, 679967, 21078977]

約数ペア:

[(1, 21078977), (31, 679967), (61, 345557), (71, 296887), (157, 134261), (1891, 11147), (2201, 9577), (4331, 4867)]