20128405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{509}}^1\times {\mathrm{719}}^1$

素因数の和:1244

約数の個数: 16

約数和(自身を含む): 26438400

約数和(自身を除く): 6309995

約数列:

[1, 5, 11, 55, 509, 719, 2545, 3595, 5599, 7909, 27995, 39545, 365971, 1829855, 4025681, 20128405]

約数ペア:

[(1, 20128405), (5, 4025681), (11, 1829855), (55, 365971), (509, 39545), (719, 27995), (2545, 7909), (3595, 5599)]