20004257

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1$

素因数の和:297

約数の個数: 32

約数和(自身を含む): 26595072

約数和(自身を除く): 6590815

約数列:

[1, 7, 13, 17, 67, 91, 119, 193, 221, 469, 871, 1139, 1351, 1547, 2509, 3281, 6097, 7973, 12931, 14807, 17563, 22967, 42653, 90517, 103649, 168103, 219827, 298571, 1176721, 1538789, 2857751, 20004257]

約数ペア:

[(1, 20004257), (7, 2857751), (13, 1538789), (17, 1176721), (67, 298571), (91, 219827), (119, 168103), (193, 103649), (221, 90517), (469, 42653), (871, 22967), (1139, 17563), (1351, 14807), (1547, 12931), (2509, 7973), (3281, 6097)]