20745333

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{139}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 36341760

約数和(自身を除く): 15596427

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 103, 139, 161, 207, 309, 417, 483, 721, 927, 973, 1251, 1449, 2163, 2369, 2919, 3197, 6489, 7107, 8757, 9591, 14317, 16583, 21321, 22379, 28773, 42951, 49749, 67137, 100219, 128853, 149247, 201411, 300657, 329291, 901971, 987873, 2305037, 2963619, 6915111, 20745333]

約数ペア:

[(1, 20745333), (3, 6915111), (7, 2963619), (9, 2305037), (21, 987873), (23, 901971), (63, 329291), (69, 300657), (103, 201411), (139, 149247), (161, 128853), (207, 100219), (309, 67137), (417, 49749), (483, 42951), (721, 28773), (927, 22379), (973, 21321), (1251, 16583), (1449, 14317), (2163, 9591), (2369, 8757), (2919, 7107), (3197, 6489)]