77680000

素因数分解:

$2^7\times 5^4\times {\mathrm{971}}^1$

素因数の和:1005

約数の個数: 80

約数和(自身を含む): 193578660

約数和(自身を除く): 115898660

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, 971, 1000, 1250, 1600, 1942, 2000, 2500, 3200, 3884, 4000, 4855, 5000, 7768, 8000, 9710, 10000, 15536, 16000, 19420, 20000, 24275, 31072, 38840, 40000, 48550, 62144, 77680, 80000, 97100, 121375, 124288, 155360, 194200, 242750, 310720, 388400, 485500, 606875, 621440, 776800, 971000, 1213750, 1553600, 1942000, 2427500, 3107200, 3884000, 4855000, 7768000, 9710000, 15536000, 19420000, 38840000, 77680000]

約数ペア:

[(1, 77680000), (2, 38840000), (4, 19420000), (5, 15536000), (8, 9710000), (10, 7768000), (16, 4855000), (20, 3884000), (25, 3107200), (32, 2427500), (40, 1942000), (50, 1553600), (64, 1213750), (80, 971000), (100, 776800), (125, 621440), (128, 606875), (160, 485500), (200, 388400), (250, 310720), (320, 242750), (400, 194200), (500, 155360), (625, 124288), (640, 121375), (800, 97100), (971, 80000), (1000, 77680), (1250, 62144), (1600, 48550), (1942, 40000), (2000, 38840), (2500, 31072), (3200, 24275), (3884, 20000), (4000, 19420), (4855, 16000), (5000, 15536), (7768, 10000), (8000, 9710)]