27981813

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{431}}^1$

素因数の和:537

約数の個数: 32

約数和(自身を含む): 42301440

約数和(自身を除く): 14319627

約数列:

[1, 3, 17, 19, 51, 57, 67, 201, 323, 431, 969, 1139, 1273, 1293, 3417, 3819, 7327, 8189, 21641, 21981, 24567, 28877, 64923, 86631, 139213, 417639, 490909, 548663, 1472727, 1645989, 9327271, 27981813]

約数ペア:

[(1, 27981813), (3, 9327271), (17, 1645989), (19, 1472727), (51, 548663), (57, 490909), (67, 417639), (201, 139213), (323, 86631), (431, 64923), (969, 28877), (1139, 24567), (1273, 21981), (1293, 21641), (3417, 8189), (3819, 7327)]