19992427

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{373}}^1$

素因数の和:443

約数の個数: 32

約数和(自身を含む): 26808320

約数和(自身を除く): 6815893

約数列:

[1, 7, 13, 19, 31, 91, 133, 217, 247, 373, 403, 589, 1729, 2611, 2821, 4123, 4849, 7087, 7657, 11563, 33943, 49609, 53599, 80941, 92131, 150319, 219697, 644917, 1052233, 1537879, 2856061, 19992427]

約数ペア:

[(1, 19992427), (7, 2856061), (13, 1537879), (19, 1052233), (31, 644917), (91, 219697), (133, 150319), (217, 92131), (247, 80941), (373, 53599), (403, 49609), (589, 33943), (1729, 11563), (2611, 7657), (2821, 7087), (4123, 4849)]