20720259

素因数分解:

$3^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{2963}}^1$

素因数の和:3016

約数の個数: 32

約数和(自身を含む): 36042240

約数和(自身を除く): 15321981

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 111, 189, 259, 333, 777, 999, 2331, 2963, 6993, 8889, 20741, 26667, 62223, 80001, 109631, 186669, 328893, 560007, 767417, 986679, 2302251, 2960037, 6906753, 20720259]

約数ペア:

[(1, 20720259), (3, 6906753), (7, 2960037), (9, 2302251), (21, 986679), (27, 767417), (37, 560007), (63, 328893), (111, 186669), (189, 109631), (259, 80001), (333, 62223), (777, 26667), (999, 20741), (2331, 8889), (2963, 6993)]