20829820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{1297}}^1$

素因数の和:1390

約数の個数: 48

約数和(自身を含む): 48410208

約数和(自身を除く): 27580388

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 73, 110, 146, 220, 292, 365, 730, 803, 1297, 1460, 1606, 2594, 3212, 4015, 5188, 6485, 8030, 12970, 14267, 16060, 25940, 28534, 57068, 71335, 94681, 142670, 189362, 285340, 378724, 473405, 946810, 1041491, 1893620, 2082982, 4165964, 5207455, 10414910, 20829820]

約数ペア:

[(1, 20829820), (2, 10414910), (4, 5207455), (5, 4165964), (10, 2082982), (11, 1893620), (20, 1041491), (22, 946810), (44, 473405), (55, 378724), (73, 285340), (110, 189362), (146, 142670), (220, 94681), (292, 71335), (365, 57068), (730, 28534), (803, 25940), (1297, 16060), (1460, 14267), (1606, 12970), (2594, 8030), (3212, 6485), (4015, 5188)]