20821203

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{709}}^1$

素因数の和:979

約数の個数: 24

約数和(自身を含む): 32563440

約数和(自身を除く): 11742237

約数列:

[1, 3, 9, 13, 39, 117, 251, 709, 753, 2127, 2259, 3263, 6381, 9217, 9789, 27651, 29367, 82953, 177959, 533877, 1601631, 2313467, 6940401, 20821203]

約数ペア:

[(1, 20821203), (3, 6940401), (9, 2313467), (13, 1601631), (39, 533877), (117, 177959), (251, 82953), (709, 29367), (753, 27651), (2127, 9789), (2259, 9217), (3263, 6381)]