28921779

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:237

約数の個数: 40

約数和(自身を含む): 45163008

約数和(自身を除く): 16241229

約数列:

[1, 3, 9, 27, 47, 71, 81, 107, 141, 213, 321, 423, 639, 963, 1269, 1917, 2889, 3337, 3807, 5029, 5751, 7597, 8667, 10011, 15087, 22791, 30033, 45261, 68373, 90099, 135783, 205119, 270297, 357059, 407349, 615357, 1071177, 3213531, 9640593, 28921779]

約数ペア:

[(1, 28921779), (3, 9640593), (9, 3213531), (27, 1071177), (47, 615357), (71, 407349), (81, 357059), (107, 270297), (141, 205119), (213, 135783), (321, 90099), (423, 68373), (639, 45261), (963, 30033), (1269, 22791), (1917, 15087), (2889, 10011), (3337, 8667), (3807, 7597), (5029, 5751)]