19815513193

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{233}}^1\times {\mathrm{20627}}^1$

素因数の和:20917

約数の個数: 32

約数和(自身を含む): 24713994240

約数和(自身を除く): 4898481047

約数列:

[1, 7, 19, 31, 133, 217, 233, 589, 1631, 4123, 4427, 7223, 20627, 30989, 50561, 137237, 144389, 391913, 639437, 960659, 2743391, 4476059, 4806091, 12149303, 33642637, 85045121, 91315729, 148988821, 639210103, 1042921747, 2830787599, 19815513193]

約数ペア:

[(1, 19815513193), (7, 2830787599), (19, 1042921747), (31, 639210103), (133, 148988821), (217, 91315729), (233, 85045121), (589, 33642637), (1631, 12149303), (4123, 4806091), (4427, 4476059), (7223, 2743391), (20627, 960659), (30989, 639437), (50561, 391913), (137237, 144389)]