20454140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{193}}^1\times {\mathrm{757}}^1$

素因数の和:966

約数の個数: 48

約数和(自身を含む): 49409472

約数和(自身を除く): 28955332

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 193, 386, 757, 772, 965, 1351, 1514, 1930, 2702, 3028, 3785, 3860, 5299, 5404, 6755, 7570, 10598, 13510, 15140, 21196, 26495, 27020, 52990, 105980, 146101, 292202, 584404, 730505, 1022707, 1461010, 2045414, 2922020, 4090828, 5113535, 10227070, 20454140]

約数ペア:

[(1, 20454140), (2, 10227070), (4, 5113535), (5, 4090828), (7, 2922020), (10, 2045414), (14, 1461010), (20, 1022707), (28, 730505), (35, 584404), (70, 292202), (140, 146101), (193, 105980), (386, 52990), (757, 27020), (772, 26495), (965, 21196), (1351, 15140), (1514, 13510), (1930, 10598), (2702, 7570), (3028, 6755), (3785, 5404), (3860, 5299)]