19720519

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{5857}}^1$

素因数の和:5914

約数の個数: 16

約数和(自身を含む): 24931648

約数和(自身を除く): 5211129

約数列:

[1, 7, 13, 37, 91, 259, 481, 3367, 5857, 40999, 76141, 216709, 532987, 1516963, 2817217, 19720519]

約数ペア:

[(1, 19720519), (7, 2817217), (13, 1516963), (37, 532987), (91, 216709), (259, 76141), (481, 40999), (3367, 5857)]