19894100

素因数分解:

$2^2\times 5^2\times {\mathrm{198941}}^1$

素因数の和:198955

約数の個数: 18

約数和(自身を含む): 43170414

約数和(自身を除く): 23276314

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 198941, 397882, 795764, 994705, 1989410, 3978820, 4973525, 9947050, 19894100]

約数ペア:

[(1, 19894100), (2, 9947050), (4, 4973525), (5, 3978820), (10, 1989410), (20, 994705), (25, 795764), (50, 397882), (100, 198941)]