21456136

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{2003}}^1$

素因数の和:2125

約数の個数: 32

約数和(自身を含む): 43767360

約数和(自身を除く): 22311224

約数列:

[1, 2, 4, 8, 13, 26, 52, 103, 104, 206, 412, 824, 1339, 2003, 2678, 4006, 5356, 8012, 10712, 16024, 26039, 52078, 104156, 206309, 208312, 412618, 825236, 1650472, 2682017, 5364034, 10728068, 21456136]

約数ペア:

[(1, 21456136), (2, 10728068), (4, 5364034), (8, 2682017), (13, 1650472), (26, 825236), (52, 412618), (103, 208312), (104, 206309), (206, 104156), (412, 52078), (824, 26039), (1339, 16024), (2003, 10712), (2678, 8012), (4006, 5356)]