20988404

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{3907}}^1$

素因数の和:4007

約数の個数: 24

約数和(自身を含む): 39392640

約数和(自身を除く): 18404236

約数列:

[1, 2, 4, 17, 34, 68, 79, 158, 316, 1343, 2686, 3907, 5372, 7814, 15628, 66419, 132838, 265676, 308653, 617306, 1234612, 5247101, 10494202, 20988404]

約数ペア:

[(1, 20988404), (2, 10494202), (4, 5247101), (17, 1234612), (34, 617306), (68, 308653), (79, 265676), (158, 132838), (316, 66419), (1343, 15628), (2686, 7814), (3907, 5372)]