19775440

素因数分解:

$2^4\times 5^1\times {\mathrm{247193}}^1$

素因数の和:247206

約数の個数: 20

約数和(自身を含む): 45978084

約数和(自身を除く): 26202644

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247193, 494386, 988772, 1235965, 1977544, 2471930, 3955088, 4943860, 9887720, 19775440]

約数ペア:

[(1, 19775440), (2, 9887720), (4, 4943860), (5, 3955088), (8, 2471930), (10, 1977544), (16, 1235965), (20, 988772), (40, 494386), (80, 247193)]