20902905

素因数分解:

$3^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{2083}}^1$

素因数の和:2317

約数の個数: 24

約数和(自身を含む): 36411648

約数和(自身を除く): 15508743

約数列:

[1, 3, 5, 9, 15, 45, 223, 669, 1115, 2007, 2083, 3345, 6249, 10035, 10415, 18747, 31245, 93735, 464509, 1393527, 2322545, 4180581, 6967635, 20902905]

約数ペア:

[(1, 20902905), (3, 6967635), (5, 4180581), (9, 2322545), (15, 1393527), (45, 464509), (223, 93735), (669, 31245), (1115, 18747), (2007, 10415), (2083, 10035), (3345, 6249)]