19661781

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{3989}}^1$

素因数の和:4076

約数の個数: 16

約数和(自身を含む): 27578880

約数和(自身を除く): 7917099

約数列:

[1, 3, 31, 53, 93, 159, 1643, 3989, 4929, 11967, 123659, 211417, 370977, 634251, 6553927, 19661781]

約数ペア:

[(1, 19661781), (3, 6553927), (31, 634251), (53, 370977), (93, 211417), (159, 123659), (1643, 11967), (3989, 4929)]