21282807

素因数分解:

$3^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:117

約数の個数: 64

約数和(自身を含む): 37452800

約数和(自身を除く): 16169993

約数列:

[1, 3, 7, 13, 21, 37, 39, 43, 49, 91, 111, 129, 147, 259, 273, 301, 343, 481, 559, 637, 777, 903, 1029, 1443, 1591, 1677, 1813, 1911, 2107, 3367, 3913, 4459, 4773, 5439, 6321, 10101, 11137, 11739, 12691, 13377, 14749, 20683, 23569, 27391, 33411, 38073, 44247, 62049, 70707, 77959, 82173, 144781, 164983, 191737, 233877, 434343, 494949, 545713, 575211, 1013467, 1637139, 3040401, 7094269, 21282807]

約数ペア:

[(1, 21282807), (3, 7094269), (7, 3040401), (13, 1637139), (21, 1013467), (37, 575211), (39, 545713), (43, 494949), (49, 434343), (91, 233877), (111, 191737), (129, 164983), (147, 144781), (259, 82173), (273, 77959), (301, 70707), (343, 62049), (481, 44247), (559, 38073), (637, 33411), (777, 27391), (903, 23569), (1029, 20683), (1443, 14749), (1591, 13377), (1677, 12691), (1813, 11739), (1911, 11137), (2107, 10101), (3367, 6321), (3913, 5439), (4459, 4773)]