21523579

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 28311552

約数和(自身を除く): 6787973

約数列:

[1, 7, 11, 31, 71, 77, 127, 217, 341, 497, 781, 889, 1397, 2201, 2387, 3937, 5467, 9017, 9779, 15407, 24211, 27559, 43307, 63119, 99187, 169477, 279527, 303149, 694309, 1956689, 3074797, 21523579]

約数ペア:

[(1, 21523579), (7, 3074797), (11, 1956689), (31, 694309), (71, 303149), (77, 279527), (127, 169477), (217, 99187), (341, 63119), (497, 43307), (781, 27559), (889, 24211), (1397, 15407), (2201, 9779), (2387, 9017), (3937, 5467)]