28139139

素因数分解:

$3^2\times 7^1\times {\mathrm{317}}^1\times {\mathrm{1409}}^1$

素因数の和:1739

約数の個数: 24

約数和(自身を含む): 46631520

約数和(自身を除く): 18492381

約数列:

[1, 3, 7, 9, 21, 63, 317, 951, 1409, 2219, 2853, 4227, 6657, 9863, 12681, 19971, 29589, 88767, 446653, 1339959, 3126571, 4019877, 9379713, 28139139]

約数ペア:

[(1, 28139139), (3, 9379713), (7, 4019877), (9, 3126571), (21, 1339959), (63, 446653), (317, 88767), (951, 29589), (1409, 19971), (2219, 12681), (2853, 9863), (4227, 6657)]