21288155

素因数分解:

$5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{4643}}^1$

素因数の和:4786

約数の個数: 16

約数和(自身を含む): 29424384

約数和(自身を除く): 8136229

約数列:

[1, 5, 7, 35, 131, 655, 917, 4585, 4643, 23215, 32501, 162505, 608233, 3041165, 4257631, 21288155]

約数ペア:

[(1, 21288155), (5, 4257631), (7, 3041165), (35, 608233), (131, 162505), (655, 32501), (917, 23215), (4585, 4643)]