19891250

素因数分解:

$2^1\times 5^4\times {\mathrm{15913}}^1$

素因数の和:15935

約数の個数: 20

約数和(自身を含む): 37286502

約数和(自身を除く): 17395252

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 625, 1250, 15913, 31826, 79565, 159130, 397825, 795650, 1989125, 3978250, 9945625, 19891250]

約数ペア:

[(1, 19891250), (2, 9945625), (5, 3978250), (10, 1989125), (25, 795650), (50, 397825), (125, 159130), (250, 79565), (625, 31826), (1250, 15913)]