20212440

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{433}}^1$

素因数の和:836

約数の個数: 64

約数和(自身を含む): 60933600

約数和(自身を除く): 40721160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 389, 433, 778, 866, 1167, 1299, 1556, 1732, 1945, 2165, 2334, 2598, 3112, 3464, 3890, 4330, 4668, 5196, 5835, 6495, 7780, 8660, 9336, 10392, 11670, 12990, 15560, 17320, 23340, 25980, 46680, 51960, 168437, 336874, 505311, 673748, 842185, 1010622, 1347496, 1684370, 2021244, 2526555, 3368740, 4042488, 5053110, 6737480, 10106220, 20212440]

約数ペア:

[(1, 20212440), (2, 10106220), (3, 6737480), (4, 5053110), (5, 4042488), (6, 3368740), (8, 2526555), (10, 2021244), (12, 1684370), (15, 1347496), (20, 1010622), (24, 842185), (30, 673748), (40, 505311), (60, 336874), (120, 168437), (389, 51960), (433, 46680), (778, 25980), (866, 23340), (1167, 17320), (1299, 15560), (1556, 12990), (1732, 11670), (1945, 10392), (2165, 9336), (2334, 8660), (2598, 7780), (3112, 6495), (3464, 5835), (3890, 5196), (4330, 4668)]