19806787

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{421}}^1$

素因数の和:499

約数の個数: 32

約数和(自身を含む): 27224064

約数和(自身を除く): 7417277

約数列:

[1, 7, 11, 13, 47, 77, 91, 143, 329, 421, 517, 611, 1001, 2947, 3619, 4277, 4631, 5473, 6721, 19787, 32417, 38311, 47047, 60203, 138509, 217657, 257231, 421421, 1523599, 1800617, 2829541, 19806787]

約数ペア:

[(1, 19806787), (7, 2829541), (11, 1800617), (13, 1523599), (47, 421421), (77, 257231), (91, 217657), (143, 138509), (329, 60203), (421, 47047), (517, 38311), (611, 32417), (1001, 19787), (2947, 6721), (3619, 5473), (4277, 4631)]