20165859

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{991}}^1$

素因数の和:1040

約数の個数: 48

約数和(自身を含む): 37140480

約数和(自身を除く): 16974621

約数列:

[1, 3, 7, 9, 17, 19, 21, 51, 57, 63, 119, 133, 153, 171, 323, 357, 399, 969, 991, 1071, 1197, 2261, 2907, 2973, 6783, 6937, 8919, 16847, 18829, 20349, 20811, 50541, 56487, 62433, 117929, 131803, 151623, 169461, 320093, 353787, 395409, 960279, 1061361, 1186227, 2240651, 2880837, 6721953, 20165859]

約数ペア:

[(1, 20165859), (3, 6721953), (7, 2880837), (9, 2240651), (17, 1186227), (19, 1061361), (21, 960279), (51, 395409), (57, 353787), (63, 320093), (119, 169461), (133, 151623), (153, 131803), (171, 117929), (323, 62433), (357, 56487), (399, 50541), (969, 20811), (991, 20349), (1071, 18829), (1197, 16847), (2261, 8919), (2907, 6937), (2973, 6783)]