20275000

素因数分解:

$2^3\times 5^5\times {\mathrm{811}}^1$

素因数の和:842

約数の個数: 48

約数和(自身を含む): 47575080

約数和(自身を除く): 27300080

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 811, 1000, 1250, 1622, 2500, 3125, 3244, 4055, 5000, 6250, 6488, 8110, 12500, 16220, 20275, 25000, 32440, 40550, 81100, 101375, 162200, 202750, 405500, 506875, 811000, 1013750, 2027500, 2534375, 4055000, 5068750, 10137500, 20275000]

約数ペア:

[(1, 20275000), (2, 10137500), (4, 5068750), (5, 4055000), (8, 2534375), (10, 2027500), (20, 1013750), (25, 811000), (40, 506875), (50, 405500), (100, 202750), (125, 162200), (200, 101375), (250, 81100), (500, 40550), (625, 32440), (811, 25000), (1000, 20275), (1250, 16220), (1622, 12500), (2500, 8110), (3125, 6488), (3244, 6250), (4055, 5000)]