18811947

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:160

約数の個数: 64

約数和(自身を含む): 33619968

約数和(自身を除く): 14808021

約数列:

[1, 3, 7, 11, 21, 31, 33, 37, 71, 77, 93, 111, 213, 217, 231, 259, 341, 407, 497, 651, 777, 781, 1023, 1147, 1221, 1491, 2201, 2343, 2387, 2627, 2849, 3441, 5467, 6603, 7161, 7881, 8029, 8547, 12617, 15407, 16401, 18389, 24087, 24211, 28897, 37851, 46221, 55167, 72633, 81437, 86691, 88319, 169477, 202279, 244311, 264957, 508431, 570059, 606837, 895807, 1710177, 2687421, 6270649, 18811947]

約数ペア:

[(1, 18811947), (3, 6270649), (7, 2687421), (11, 1710177), (21, 895807), (31, 606837), (33, 570059), (37, 508431), (71, 264957), (77, 244311), (93, 202279), (111, 169477), (213, 88319), (217, 86691), (231, 81437), (259, 72633), (341, 55167), (407, 46221), (497, 37851), (651, 28897), (777, 24211), (781, 24087), (1023, 18389), (1147, 16401), (1221, 15407), (1491, 12617), (2201, 8547), (2343, 8029), (2387, 7881), (2627, 7161), (2849, 6603), (3441, 5467)]