19420000

素因数分解:

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

素因数の和:1001

約数の個数: 60

約数和(自身を含む): 47825316

約数和(自身を除く): 28405316

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 971, 1000, 1250, 1942, 2000, 2500, 3884, 4000, 4855, 5000, 7768, 9710, 10000, 15536, 19420, 20000, 24275, 31072, 38840, 48550, 77680, 97100, 121375, 155360, 194200, 242750, 388400, 485500, 606875, 776800, 971000, 1213750, 1942000, 2427500, 3884000, 4855000, 9710000, 19420000]

約数ペア:

[(1, 19420000), (2, 9710000), (4, 4855000), (5, 3884000), (8, 2427500), (10, 1942000), (16, 1213750), (20, 971000), (25, 776800), (32, 606875), (40, 485500), (50, 388400), (80, 242750), (100, 194200), (125, 155360), (160, 121375), (200, 97100), (250, 77680), (400, 48550), (500, 38840), (625, 31072), (800, 24275), (971, 20000), (1000, 19420), (1250, 15536), (1942, 10000), (2000, 9710), (2500, 7768), (3884, 5000), (4000, 4855)]