20853945

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{277}}^1$

素因数の和:534

約数の個数: 48

約数和(自身を含む): 41633280

約数和(自身を除く): 20779335

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 239, 277, 315, 717, 831, 1195, 1385, 1673, 1939, 2151, 2493, 3585, 4155, 5019, 5817, 8365, 9695, 10755, 12465, 15057, 17451, 25095, 29085, 66203, 75285, 87255, 198609, 331015, 463421, 595827, 993045, 1390263, 2317105, 2979135, 4170789, 6951315, 20853945]

約数ペア:

[(1, 20853945), (3, 6951315), (5, 4170789), (7, 2979135), (9, 2317105), (15, 1390263), (21, 993045), (35, 595827), (45, 463421), (63, 331015), (105, 198609), (239, 87255), (277, 75285), (315, 66203), (717, 29085), (831, 25095), (1195, 17451), (1385, 15057), (1673, 12465), (1939, 10755), (2151, 9695), (2493, 8365), (3585, 5817), (4155, 5019)]