20687481

素因数分解:

$3^4\times {\mathrm{97}}^1\times {\mathrm{2633}}^1$

素因数の和:2742

約数の個数: 20

約数和(自身を含む): 31233972

約数和(自身を除く): 10546491

約数列:

[1, 3, 9, 27, 81, 97, 291, 873, 2619, 2633, 7857, 7899, 23697, 71091, 213273, 255401, 766203, 2298609, 6895827, 20687481]

約数ペア:

[(1, 20687481), (3, 6895827), (9, 2298609), (27, 766203), (81, 255401), (97, 213273), (291, 71091), (873, 23697), (2619, 7899), (2633, 7857)]