19801665

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{3761}}^1$

素因数の和:3791

約数の個数: 40

約数和(自身を含む): 38236968

約数和(自身を除く): 18435303

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 195, 351, 405, 585, 1053, 1755, 3761, 5265, 11283, 18805, 33849, 48893, 56415, 101547, 146679, 169245, 244465, 304641, 440037, 507735, 733395, 1320111, 1523205, 2200185, 3960333, 6600555, 19801665]

約数ペア:

[(1, 19801665), (3, 6600555), (5, 3960333), (9, 2200185), (13, 1523205), (15, 1320111), (27, 733395), (39, 507735), (45, 440037), (65, 304641), (81, 244465), (117, 169245), (135, 146679), (195, 101547), (351, 56415), (405, 48893), (585, 33849), (1053, 18805), (1755, 11283), (3761, 5265)]