19877481

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{439}}^1$

素因数の和:507

約数の個数: 40

約数和(自身を含む): 32795840

約数和(自身を除く): 12918359

約数列:

[1, 3, 9, 13, 27, 39, 43, 81, 117, 129, 351, 387, 439, 559, 1053, 1161, 1317, 1677, 3483, 3951, 5031, 5707, 11853, 15093, 17121, 18877, 35559, 45279, 51363, 56631, 154089, 169893, 245401, 462267, 509679, 736203, 1529037, 2208609, 6625827, 19877481]

約数ペア:

[(1, 19877481), (3, 6625827), (9, 2208609), (13, 1529037), (27, 736203), (39, 509679), (43, 462267), (81, 245401), (117, 169893), (129, 154089), (351, 56631), (387, 51363), (439, 45279), (559, 35559), (1053, 18877), (1161, 17121), (1317, 15093), (1677, 11853), (3483, 5707), (3951, 5031)]