2045000

素因数分解:

$2^3\times 5^4\times {\mathrm{409}}^1$

素因数の和:435

約数の個数: 40

約数和(自身を含む): 4803150

約数和(自身を除く): 2758150

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 409, 500, 625, 818, 1000, 1250, 1636, 2045, 2500, 3272, 4090, 5000, 8180, 10225, 16360, 20450, 40900, 51125, 81800, 102250, 204500, 255625, 409000, 511250, 1022500, 2045000]

約数ペア:

[(1, 2045000), (2, 1022500), (4, 511250), (5, 409000), (8, 255625), (10, 204500), (20, 102250), (25, 81800), (40, 51125), (50, 40900), (100, 20450), (125, 16360), (200, 10225), (250, 8180), (409, 5000), (500, 4090), (625, 3272), (818, 2500), (1000, 2045), (1250, 1636)]