19989500

素因数分解:

$2^2\times 5^3\times {\mathrm{39979}}^1$

素因数の和:39998

約数の個数: 24

約数和(自身を含む): 43658160

約数和(自身を除く): 23668660

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 39979, 79958, 159916, 199895, 399790, 799580, 999475, 1998950, 3997900, 4997375, 9994750, 19989500]

約数ペア:

[(1, 19989500), (2, 9994750), (4, 4997375), (5, 3997900), (10, 1998950), (20, 999475), (25, 799580), (50, 399790), (100, 199895), (125, 159916), (250, 79958), (500, 39979)]