21670040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{401}}^1$

素因数の和:612

約数の個数: 64

約数和(自身を含む): 56151360

約数和(自身を除く): 34481320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 193, 280, 386, 401, 772, 802, 965, 1351, 1544, 1604, 1930, 2005, 2702, 2807, 3208, 3860, 4010, 5404, 5614, 6755, 7720, 8020, 10808, 11228, 13510, 14035, 16040, 22456, 27020, 28070, 54040, 56140, 77393, 112280, 154786, 309572, 386965, 541751, 619144, 773930, 1083502, 1547860, 2167004, 2708755, 3095720, 4334008, 5417510, 10835020, 21670040]

約数ペア:

[(1, 21670040), (2, 10835020), (4, 5417510), (5, 4334008), (7, 3095720), (8, 2708755), (10, 2167004), (14, 1547860), (20, 1083502), (28, 773930), (35, 619144), (40, 541751), (56, 386965), (70, 309572), (140, 154786), (193, 112280), (280, 77393), (386, 56140), (401, 54040), (772, 28070), (802, 27020), (965, 22456), (1351, 16040), (1544, 14035), (1604, 13510), (1930, 11228), (2005, 10808), (2702, 8020), (2807, 7720), (3208, 6755), (3860, 5614), (4010, 5404)]