21209105

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{4289}}^1$

素因数の和:4360

約数の個数: 16

約数和(自身を含む): 27181440

約数和(自身を除く): 5972335

約数列:

[1, 5, 23, 43, 115, 215, 989, 4289, 4945, 21445, 98647, 184427, 493235, 922135, 4241821, 21209105]

約数ペア:

[(1, 21209105), (5, 4241821), (23, 922135), (43, 493235), (115, 184427), (215, 98647), (989, 21445), (4289, 4945)]