20755400

素因数分解:

$2^3\times 5^2\times {\mathrm{157}}^1\times {\mathrm{661}}^1$

素因数の和:834

約数の個数: 48

約数和(自身を含む): 48637140

約数和(自身を除く): 27881740

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 157, 200, 314, 628, 661, 785, 1256, 1322, 1570, 2644, 3140, 3305, 3925, 5288, 6280, 6610, 7850, 13220, 15700, 16525, 26440, 31400, 33050, 66100, 103777, 132200, 207554, 415108, 518885, 830216, 1037770, 2075540, 2594425, 4151080, 5188850, 10377700, 20755400]

約数ペア:

[(1, 20755400), (2, 10377700), (4, 5188850), (5, 4151080), (8, 2594425), (10, 2075540), (20, 1037770), (25, 830216), (40, 518885), (50, 415108), (100, 207554), (157, 132200), (200, 103777), (314, 66100), (628, 33050), (661, 31400), (785, 26440), (1256, 16525), (1322, 15700), (1570, 13220), (2644, 7850), (3140, 6610), (3305, 6280), (3925, 5288)]