20478081

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{461}}^1$

素因数の和:561

約数の個数: 32

約数和(自身を含む): 31667328

約数和(自身を除く): 11189247

約数列:

[1, 3, 13, 17, 39, 51, 67, 201, 221, 461, 663, 871, 1139, 1383, 2613, 3417, 5993, 7837, 14807, 17979, 23511, 30887, 44421, 92661, 101881, 305643, 401531, 525079, 1204593, 1575237, 6826027, 20478081]

約数ペア:

[(1, 20478081), (3, 6826027), (13, 1575237), (17, 1204593), (39, 525079), (51, 401531), (67, 305643), (201, 101881), (221, 92661), (461, 44421), (663, 30887), (871, 23511), (1139, 17979), (1383, 14807), (2613, 7837), (3417, 5993)]