64880000

素因数分解:

$2^7\times 5^4\times {\mathrm{811}}^1$

素因数の和:845

約数の個数: 80

約数和(自身を含む): 161713860

約数和(自身を除く): 96833860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 500, 625, 640, 800, 811, 1000, 1250, 1600, 1622, 2000, 2500, 3200, 3244, 4000, 4055, 5000, 6488, 8000, 8110, 10000, 12976, 16000, 16220, 20000, 20275, 25952, 32440, 40000, 40550, 51904, 64880, 80000, 81100, 101375, 103808, 129760, 162200, 202750, 259520, 324400, 405500, 506875, 519040, 648800, 811000, 1013750, 1297600, 1622000, 2027500, 2595200, 3244000, 4055000, 6488000, 8110000, 12976000, 16220000, 32440000, 64880000]

約数ペア:

[(1, 64880000), (2, 32440000), (4, 16220000), (5, 12976000), (8, 8110000), (10, 6488000), (16, 4055000), (20, 3244000), (25, 2595200), (32, 2027500), (40, 1622000), (50, 1297600), (64, 1013750), (80, 811000), (100, 648800), (125, 519040), (128, 506875), (160, 405500), (200, 324400), (250, 259520), (320, 202750), (400, 162200), (500, 129760), (625, 103808), (640, 101375), (800, 81100), (811, 80000), (1000, 64880), (1250, 51904), (1600, 40550), (1622, 40000), (2000, 32440), (2500, 25952), (3200, 20275), (3244, 20000), (4000, 16220), (4055, 16000), (5000, 12976), (6488, 10000), (8000, 8110)]