20813721

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:269

約数の個数: 32

約数和(自身を含む): 30643200

約数和(自身を除く): 9829479

約数列:

[1, 3, 19, 37, 57, 71, 111, 139, 213, 417, 703, 1349, 2109, 2627, 2641, 4047, 5143, 7881, 7923, 9869, 15429, 29607, 49913, 97717, 149739, 187511, 293151, 365153, 562533, 1095459, 6937907, 20813721]

約数ペア:

[(1, 20813721), (3, 6937907), (19, 1095459), (37, 562533), (57, 365153), (71, 293151), (111, 187511), (139, 149739), (213, 97717), (417, 49913), (703, 29607), (1349, 15429), (2109, 9869), (2627, 7923), (2641, 7881), (4047, 5143)]