20081000

素因数分解:

$2^3\times 5^3\times {\mathrm{43}}^1\times {\mathrm{467}}^1$

素因数の和:531

約数の個数: 64

約数和(自身を含む): 48185280

約数和(自身を除く): 28104280

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 43, 50, 86, 100, 125, 172, 200, 215, 250, 344, 430, 467, 500, 860, 934, 1000, 1075, 1720, 1868, 2150, 2335, 3736, 4300, 4670, 5375, 8600, 9340, 10750, 11675, 18680, 20081, 21500, 23350, 40162, 43000, 46700, 58375, 80324, 93400, 100405, 116750, 160648, 200810, 233500, 401620, 467000, 502025, 803240, 1004050, 2008100, 2510125, 4016200, 5020250, 10040500, 20081000]

約数ペア:

[(1, 20081000), (2, 10040500), (4, 5020250), (5, 4016200), (8, 2510125), (10, 2008100), (20, 1004050), (25, 803240), (40, 502025), (43, 467000), (50, 401620), (86, 233500), (100, 200810), (125, 160648), (172, 116750), (200, 100405), (215, 93400), (250, 80324), (344, 58375), (430, 46700), (467, 43000), (500, 40162), (860, 23350), (934, 21500), (1000, 20081), (1075, 18680), (1720, 11675), (1868, 10750), (2150, 9340), (2335, 8600), (3736, 5375), (4300, 4670)]