12781250

素因数分解:

$2^1\times 5^6\times {\mathrm{409}}^1$

素因数の和:441

約数の個数: 28

約数和(自身を含む): 24023130

約数和(自身を除く): 11241880

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 409, 625, 818, 1250, 2045, 3125, 4090, 6250, 10225, 15625, 20450, 31250, 51125, 102250, 255625, 511250, 1278125, 2556250, 6390625, 12781250]

約数ペア:

[(1, 12781250), (2, 6390625), (5, 2556250), (10, 1278125), (25, 511250), (50, 255625), (125, 102250), (250, 51125), (409, 31250), (625, 20450), (818, 15625), (1250, 10225), (2045, 6250), (3125, 4090)]