21215155

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{4597}}^1$

素因数の和:4686

約数の個数: 16

約数和(自身を含む): 27808704

約数和(自身を除く): 6593549

約数列:

[1, 5, 13, 65, 71, 355, 923, 4597, 4615, 22985, 59761, 298805, 326387, 1631935, 4243031, 21215155]

約数ペア:

[(1, 21215155), (5, 4243031), (13, 1631935), (65, 326387), (71, 298805), (355, 59761), (923, 22985), (4597, 4615)]