81281000

素因数分解:

$2^3\times 5^3\times {\mathrm{81281}}^1$

素因数の和:81302

約数の個数: 32

約数和(自身を含む): 190199880

約数和(自身を除く): 108918880

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000, 81281, 162562, 325124, 406405, 650248, 812810, 1625620, 2032025, 3251240, 4064050, 8128100, 10160125, 16256200, 20320250, 40640500, 81281000]

約数ペア:

[(1, 81281000), (2, 40640500), (4, 20320250), (5, 16256200), (8, 10160125), (10, 8128100), (20, 4064050), (25, 3251240), (40, 2032025), (50, 1625620), (100, 812810), (125, 650248), (200, 406405), (250, 325124), (500, 162562), (1000, 81281)]