19949900

素因数分解:

$2^2\times 5^2\times {\mathrm{199499}}^1$

素因数の和:199513

約数の個数: 18

約数和(自身を含む): 43291500

約数和(自身を除く): 23341600

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199499, 398998, 797996, 997495, 1994990, 3989980, 4987475, 9974950, 19949900]

約数ペア:

[(1, 19949900), (2, 9974950), (4, 4987475), (5, 3989980), (10, 1994990), (20, 997495), (25, 797996), (50, 398998), (100, 199499)]