20320976

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{647}}^1$

素因数の和:819

約数の個数: 40

約数和(自身を含む): 42747264

約数和(自身を除く): 22426288

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 151, 208, 302, 604, 647, 1208, 1294, 1963, 2416, 2588, 3926, 5176, 7852, 8411, 10352, 15704, 16822, 31408, 33644, 67288, 97697, 134576, 195394, 390788, 781576, 1270061, 1563152, 2540122, 5080244, 10160488, 20320976]

約数ペア:

[(1, 20320976), (2, 10160488), (4, 5080244), (8, 2540122), (13, 1563152), (16, 1270061), (26, 781576), (52, 390788), (104, 195394), (151, 134576), (208, 97697), (302, 67288), (604, 33644), (647, 31408), (1208, 16822), (1294, 15704), (1963, 10352), (2416, 8411), (2588, 7852), (3926, 5176)]