20645989

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{11941}}^1$

素因数の和:11980

約数の個数: 16

約数和(自身を含む): 26750080

約数和(自身を除く): 6104091

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 11941, 83587, 155233, 226879, 1086631, 1588153, 2949427, 20645989]

約数ペア:

[(1, 20645989), (7, 2949427), (13, 1588153), (19, 1086631), (91, 226879), (133, 155233), (247, 83587), (1729, 11941)]