19992245

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6277}}^1$

素因数の和:6309

約数の個数: 24

約数和(自身を含む): 30059064

約数和(自身を除く): 10066819

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6277, 31385, 43939, 81601, 219695, 307573, 408005, 571207, 1537865, 2856035, 3998449, 19992245]

約数ペア:

[(1, 19992245), (5, 3998449), (7, 2856035), (13, 1537865), (35, 571207), (49, 408005), (65, 307573), (91, 219695), (245, 81601), (455, 43939), (637, 31385), (3185, 6277)]