19978665

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{1277}}^1$

素因数の和:1441

約数の個数: 32

約数和(自身を含む): 36806400

約数和(自身を除く): 16827735

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 149, 447, 745, 1043, 1277, 2235, 3129, 3831, 5215, 6385, 8939, 15645, 19155, 26817, 44695, 134085, 190273, 570819, 951365, 1331911, 2854095, 3995733, 6659555, 19978665]

約数ペア:

[(1, 19978665), (3, 6659555), (5, 3995733), (7, 2854095), (15, 1331911), (21, 951365), (35, 570819), (105, 190273), (149, 134085), (447, 44695), (745, 26817), (1043, 19155), (1277, 15645), (2235, 8939), (3129, 6385), (3831, 5215)]