21045020

素因数分解:

$2^2\times 5^1\times {\mathrm{937}}^1\times {\mathrm{1123}}^1$

素因数の和:2069

約数の個数: 24

約数和(自身を含む): 44281104

約数和(自身を除く): 23236084

約数列:

[1, 2, 4, 5, 10, 20, 937, 1123, 1874, 2246, 3748, 4492, 4685, 5615, 9370, 11230, 18740, 22460, 1052251, 2104502, 4209004, 5261255, 10522510, 21045020]

約数ペア:

[(1, 21045020), (2, 10522510), (4, 5261255), (5, 4209004), (10, 2104502), (20, 1052251), (937, 22460), (1123, 18740), (1874, 11230), (2246, 9370), (3748, 5615), (4492, 4685)]