19729700

素因数分解:

$2^2\times 5^2\times {\mathrm{197297}}^1$

素因数の和:197311

約数の個数: 18

約数和(自身を含む): 42813666

約数和(自身を除く): 23083966

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 197297, 394594, 789188, 986485, 1972970, 3945940, 4932425, 9864850, 19729700]

約数ペア:

[(1, 19729700), (2, 9864850), (4, 4932425), (5, 3945940), (10, 1972970), (20, 986485), (25, 789188), (50, 394594), (100, 197297)]