20918385

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{6737}}^1$

素因数の和:6774

約数の個数: 32

約数和(自身を含む): 38810880

約数和(自身を除く): 17892495

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 6737, 20211, 33685, 60633, 101055, 154951, 181899, 303165, 464853, 774755, 909495, 1394559, 2324265, 4183677, 6972795, 20918385]

約数ペア:

[(1, 20918385), (3, 6972795), (5, 4183677), (9, 2324265), (15, 1394559), (23, 909495), (27, 774755), (45, 464853), (69, 303165), (115, 181899), (135, 154951), (207, 101055), (345, 60633), (621, 33685), (1035, 20211), (3105, 6737)]