20515910

素因数分解:

$2^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{15661}}^1$

素因数の和:15799

約数の個数: 16

約数和(自身を含む): 37212912

約数和(自身を除く): 16697002

約数列:

[1, 2, 5, 10, 131, 262, 655, 1310, 15661, 31322, 78305, 156610, 2051591, 4103182, 10257955, 20515910]

約数ペア:

[(1, 20515910), (2, 10257955), (5, 4103182), (10, 2051591), (131, 156610), (262, 78305), (655, 31322), (1310, 15661)]