20663865

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{181}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 37477440

約数和(自身を除く): 16813575

約数列:

[1, 3, 5, 9, 15, 43, 45, 59, 129, 177, 181, 215, 295, 387, 531, 543, 645, 885, 905, 1629, 1935, 2537, 2655, 2715, 7611, 7783, 8145, 10679, 12685, 22833, 23349, 32037, 38055, 38915, 53395, 70047, 96111, 114165, 116745, 160185, 350235, 459197, 480555, 1377591, 2295985, 4132773, 6887955, 20663865]

約数ペア:

[(1, 20663865), (3, 6887955), (5, 4132773), (9, 2295985), (15, 1377591), (43, 480555), (45, 459197), (59, 350235), (129, 160185), (177, 116745), (181, 114165), (215, 96111), (295, 70047), (387, 53395), (531, 38915), (543, 38055), (645, 32037), (885, 23349), (905, 22833), (1629, 12685), (1935, 10679), (2537, 8145), (2655, 7783), (2715, 7611)]