21250765

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{233}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 28810080

約数和(自身を除く): 7559315

約数列:

[1, 5, 17, 29, 37, 85, 145, 185, 233, 493, 629, 1073, 1165, 2465, 3145, 3961, 5365, 6757, 8621, 18241, 19805, 33785, 43105, 91205, 114869, 146557, 250009, 574345, 732785, 1250045, 4250153, 21250765]

約数ペア:

[(1, 21250765), (5, 4250153), (17, 1250045), (29, 732785), (37, 574345), (85, 250009), (145, 146557), (185, 114869), (233, 91205), (493, 43105), (629, 33785), (1073, 19805), (1165, 18241), (2465, 8621), (3145, 6757), (3961, 5365)]