81440120

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{70207}}^1$

素因数の和:70247

約数の個数: 32

約数和(自身を含む): 189561600

約数和(自身を除く): 108121480

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 70207, 140414, 280828, 351035, 561656, 702070, 1404140, 2036003, 2808280, 4072006, 8144012, 10180015, 16288024, 20360030, 40720060, 81440120]

約数ペア:

[(1, 81440120), (2, 40720060), (4, 20360030), (5, 16288024), (8, 10180015), (10, 8144012), (20, 4072006), (29, 2808280), (40, 2036003), (58, 1404140), (116, 702070), (145, 561656), (232, 351035), (290, 280828), (580, 140414), (1160, 70207)]