19720929

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{4001}}^1$

素因数の和:4088

約数の個数: 16

約数和(自身を含む): 27661824

約数和(自身を除く): 7940895

約数列:

[1, 3, 31, 53, 93, 159, 1643, 4001, 4929, 12003, 124031, 212053, 372093, 636159, 6573643, 19720929]

約数ペア:

[(1, 19720929), (3, 6573643), (31, 636159), (53, 372093), (93, 212053), (159, 124031), (1643, 12003), (4001, 4929)]