20567967

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{257}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 32627712

約数和(自身を除く): 12059745

約数列:

[1, 3, 7, 21, 37, 103, 111, 257, 259, 309, 721, 771, 777, 1799, 2163, 3811, 5397, 9509, 11433, 26471, 26677, 28527, 66563, 79413, 80031, 185297, 199689, 555891, 979427, 2938281, 6855989, 20567967]

約数ペア:

[(1, 20567967), (3, 6855989), (7, 2938281), (21, 979427), (37, 555891), (103, 199689), (111, 185297), (257, 80031), (259, 79413), (309, 66563), (721, 28527), (771, 26677), (777, 26471), (1799, 11433), (2163, 9509), (3811, 5397)]