20287953

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{997}}^1$

素因数の和:1046

約数の個数: 48

約数和(自身を含む): 37365120

約数和(自身を除く): 17077167

約数列:

[1, 3, 7, 9, 17, 19, 21, 51, 57, 63, 119, 133, 153, 171, 323, 357, 399, 969, 997, 1071, 1197, 2261, 2907, 2991, 6783, 6979, 8973, 16949, 18943, 20349, 20937, 50847, 56829, 62811, 118643, 132601, 152541, 170487, 322031, 355929, 397803, 966093, 1067787, 1193409, 2254217, 2898279, 6762651, 20287953]

約数ペア:

[(1, 20287953), (3, 6762651), (7, 2898279), (9, 2254217), (17, 1193409), (19, 1067787), (21, 966093), (51, 397803), (57, 355929), (63, 322031), (119, 170487), (133, 152541), (153, 132601), (171, 118643), (323, 62811), (357, 56829), (399, 50847), (969, 20937), (997, 20349), (1071, 18943), (1197, 16949), (2261, 8973), (2907, 6979), (2991, 6783)]