20784663

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 33546240

約数和(自身を除く): 12761577

約数列:

[1, 3, 9, 23, 31, 41, 69, 79, 93, 123, 207, 237, 279, 369, 711, 713, 943, 1271, 1817, 2139, 2449, 2829, 3239, 3813, 5451, 6417, 7347, 8487, 9717, 11439, 16353, 22041, 29151, 29233, 56327, 74497, 87699, 100409, 168981, 223491, 263097, 301227, 506943, 670473, 903681, 2309407, 6928221, 20784663]

約数ペア:

[(1, 20784663), (3, 6928221), (9, 2309407), (23, 903681), (31, 670473), (41, 506943), (69, 301227), (79, 263097), (93, 223491), (123, 168981), (207, 100409), (237, 87699), (279, 74497), (369, 56327), (711, 29233), (713, 29151), (943, 22041), (1271, 16353), (1817, 11439), (2139, 9717), (2449, 8487), (2829, 7347), (3239, 6417), (3813, 5451)]