8180000

素因数分解:

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

素因数の和:439

約数の個数: 60

約数和(自身を含む): 20173230

約数和(自身を除く): 11993230

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 409, 500, 625, 800, 818, 1000, 1250, 1636, 2000, 2045, 2500, 3272, 4000, 4090, 5000, 6544, 8180, 10000, 10225, 13088, 16360, 20000, 20450, 32720, 40900, 51125, 65440, 81800, 102250, 163600, 204500, 255625, 327200, 409000, 511250, 818000, 1022500, 1636000, 2045000, 4090000, 8180000]

約数ペア:

[(1, 8180000), (2, 4090000), (4, 2045000), (5, 1636000), (8, 1022500), (10, 818000), (16, 511250), (20, 409000), (25, 327200), (32, 255625), (40, 204500), (50, 163600), (80, 102250), (100, 81800), (125, 65440), (160, 51125), (200, 40900), (250, 32720), (400, 20450), (409, 20000), (500, 16360), (625, 13088), (800, 10225), (818, 10000), (1000, 8180), (1250, 6544), (1636, 5000), (2000, 4090), (2045, 4000), (2500, 3272)]