20512920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{199}}^1\times {\mathrm{859}}^1$

素因数の和:1072

約数の個数: 64

約数和(自身を含む): 61920000

約数和(自身を除く): 41407080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 199, 398, 597, 796, 859, 995, 1194, 1592, 1718, 1990, 2388, 2577, 2985, 3436, 3980, 4295, 4776, 5154, 5970, 6872, 7960, 8590, 10308, 11940, 12885, 17180, 20616, 23880, 25770, 34360, 51540, 103080, 170941, 341882, 512823, 683764, 854705, 1025646, 1367528, 1709410, 2051292, 2564115, 3418820, 4102584, 5128230, 6837640, 10256460, 20512920]

約数ペア:

[(1, 20512920), (2, 10256460), (3, 6837640), (4, 5128230), (5, 4102584), (6, 3418820), (8, 2564115), (10, 2051292), (12, 1709410), (15, 1367528), (20, 1025646), (24, 854705), (30, 683764), (40, 512823), (60, 341882), (120, 170941), (199, 103080), (398, 51540), (597, 34360), (796, 25770), (859, 23880), (995, 20616), (1194, 17180), (1592, 12885), (1718, 11940), (1990, 10308), (2388, 8590), (2577, 7960), (2985, 6872), (3436, 5970), (3980, 5154), (4295, 4776)]