19720309

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{4783}}^1$

素因数の和:4840

約数の個数: 16

約数和(自身を含む): 24494080

約数和(自身を除く): 4773771

約数列:

[1, 7, 19, 31, 133, 217, 589, 4123, 4783, 33481, 90877, 148273, 636139, 1037911, 2817187, 19720309]

約数ペア:

[(1, 19720309), (7, 2817187), (19, 1037911), (31, 636139), (133, 148273), (217, 90877), (589, 33481), (4123, 4783)]