20878060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{757}}^1$

素因数の和:970

約数の個数: 48

約数和(自身を含む): 50428224

約数和(自身を除く): 29550164

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 757, 788, 985, 1379, 1514, 1970, 2758, 3028, 3785, 3940, 5299, 5516, 6895, 7570, 10598, 13790, 15140, 21196, 26495, 27580, 52990, 105980, 149129, 298258, 596516, 745645, 1043903, 1491290, 2087806, 2982580, 4175612, 5219515, 10439030, 20878060]

約数ペア:

[(1, 20878060), (2, 10439030), (4, 5219515), (5, 4175612), (7, 2982580), (10, 2087806), (14, 1491290), (20, 1043903), (28, 745645), (35, 596516), (70, 298258), (140, 149129), (197, 105980), (394, 52990), (757, 27580), (788, 26495), (985, 21196), (1379, 15140), (1514, 13790), (1970, 10598), (2758, 7570), (3028, 6895), (3785, 5516), (3940, 5299)]