4090000

素因数分解:

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

素因数の和:437

約数の個数: 50

約数和(自身を含む): 9926510

約数和(自身を除く): 5836510

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 409, 500, 625, 818, 1000, 1250, 1636, 2000, 2045, 2500, 3272, 4090, 5000, 6544, 8180, 10000, 10225, 16360, 20450, 32720, 40900, 51125, 81800, 102250, 163600, 204500, 255625, 409000, 511250, 818000, 1022500, 2045000, 4090000]

約数ペア:

[(1, 4090000), (2, 2045000), (4, 1022500), (5, 818000), (8, 511250), (10, 409000), (16, 255625), (20, 204500), (25, 163600), (40, 102250), (50, 81800), (80, 51125), (100, 40900), (125, 32720), (200, 20450), (250, 16360), (400, 10225), (409, 10000), (500, 8180), (625, 6544), (818, 5000), (1000, 4090), (1250, 3272), (1636, 2500), (2000, 2045)]