20859440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{193}}^2$

素因数の和:406

約数の個数: 60

約数和(自身を含む): 55715184

約数和(自身を除く): 34855744

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 193, 280, 386, 560, 772, 965, 1351, 1544, 1930, 2702, 3088, 3860, 5404, 6755, 7720, 10808, 13510, 15440, 21616, 27020, 37249, 54040, 74498, 108080, 148996, 186245, 260743, 297992, 372490, 521486, 595984, 744980, 1042972, 1303715, 1489960, 2085944, 2607430, 2979920, 4171888, 5214860, 10429720, 20859440]

約数ペア:

[(1, 20859440), (2, 10429720), (4, 5214860), (5, 4171888), (7, 2979920), (8, 2607430), (10, 2085944), (14, 1489960), (16, 1303715), (20, 1042972), (28, 744980), (35, 595984), (40, 521486), (56, 372490), (70, 297992), (80, 260743), (112, 186245), (140, 148996), (193, 108080), (280, 74498), (386, 54040), (560, 37249), (772, 27020), (965, 21616), (1351, 15440), (1544, 13510), (1930, 10808), (2702, 7720), (3088, 6755), (3860, 5404)]