21175888

素因数分解:

$2^4\times {\mathrm{131}}^1\times {\mathrm{10103}}^1$

素因数の和:10242

約数の個数: 20

約数和(自身を含む): 41345568

約数和(自身を除く): 20169680

約数列:

[1, 2, 4, 8, 16, 131, 262, 524, 1048, 2096, 10103, 20206, 40412, 80824, 161648, 1323493, 2646986, 5293972, 10587944, 21175888]

約数ペア:

[(1, 21175888), (2, 10587944), (4, 5293972), (8, 2646986), (16, 1323493), (131, 161648), (262, 80824), (524, 40412), (1048, 20206), (2096, 10103)]