20197780180

素因数分解:

$2^2\times 5^1\times {\mathrm{1009889009}}^1$

素因数の和:1009889018

約数の個数: 12

約数和(自身を含む): 42415338420

約数和(自身を除く): 22217558240

約数列:

[1, 2, 4, 5, 10, 20, 1009889009, 2019778018, 4039556036, 5049445045, 10098890090, 20197780180]

約数ペア:

[(1, 20197780180), (2, 10098890090), (4, 5049445045), (5, 4039556036), (10, 2019778018), (20, 1009889009)]