19871817

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{7451}}^1$

素因数の和:7588

約数の個数: 16

約数和(自身を含む): 30523392

約数和(自身を除く): 10651575

約数列:

[1, 3, 7, 21, 127, 381, 889, 2667, 7451, 22353, 52157, 156471, 946277, 2838831, 6623939, 19871817]

約数ペア:

[(1, 19871817), (3, 6623939), (7, 2838831), (21, 946277), (127, 156471), (381, 52157), (889, 22353), (2667, 7451)]