405739120

素因数分解:

$2^4\times 5^1\times {\mathrm{997}}^1\times {\mathrm{5087}}^1$

素因数の和:6097

約数の個数: 40

約数和(自身を含む): 944475264

約数和(自身を除く): 538736144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 997, 1994, 3988, 4985, 5087, 7976, 9970, 10174, 15952, 19940, 20348, 25435, 39880, 40696, 50870, 79760, 81392, 101740, 203480, 406960, 5071739, 10143478, 20286956, 25358695, 40573912, 50717390, 81147824, 101434780, 202869560, 405739120]

約数ペア:

[(1, 405739120), (2, 202869560), (4, 101434780), (5, 81147824), (8, 50717390), (10, 40573912), (16, 25358695), (20, 20286956), (40, 10143478), (80, 5071739), (997, 406960), (1994, 203480), (3988, 101740), (4985, 81392), (5087, 79760), (7976, 50870), (9970, 40696), (10174, 39880), (15952, 25435), (19940, 20348)]