20405420

素因数分解:

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

素因数の和:145769

約数の個数: 24

約数和(自身を含む): 48973344

約数和(自身を除く): 28567924

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 145753, 291506, 583012, 728765, 1020271, 1457530, 2040542, 2915060, 4081084, 5101355, 10202710, 20405420]

約数ペア:

[(1, 20405420), (2, 10202710), (4, 5101355), (5, 4081084), (7, 2915060), (10, 2040542), (14, 1457530), (20, 1020271), (28, 728765), (35, 583012), (70, 291506), (140, 145753)]