21720008

素因数分解:

$2^3\times {\mathrm{157}}^1\times {\mathrm{17293}}^1$

素因数の和:17456

約数の個数: 16

約数和(自身を含む): 40986780

約数和(自身を除く): 19266772

約数列:

[1, 2, 4, 8, 157, 314, 628, 1256, 17293, 34586, 69172, 138344, 2715001, 5430002, 10860004, 21720008]

約数ペア:

[(1, 21720008), (2, 10860004), (4, 5430002), (8, 2715001), (157, 138344), (314, 69172), (628, 34586), (1256, 17293)]