81621680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{145753}}^1$

素因数の和:145773

約数の個数: 40

約数和(自身を含む): 216881952

約数和(自身を除く): 135260272

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 145753, 291506, 583012, 728765, 1020271, 1166024, 1457530, 2040542, 2332048, 2915060, 4081084, 5101355, 5830120, 8162168, 10202710, 11660240, 16324336, 20405420, 40810840, 81621680]

約数ペア:

[(1, 81621680), (2, 40810840), (4, 20405420), (5, 16324336), (7, 11660240), (8, 10202710), (10, 8162168), (14, 5830120), (16, 5101355), (20, 4081084), (28, 2915060), (35, 2332048), (40, 2040542), (56, 1457530), (70, 1166024), (80, 1020271), (112, 728765), (140, 583012), (280, 291506), (560, 145753)]