21052137

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 30962304

約数和(自身を除く): 9910167

約数列:

[1, 3, 17, 51, 61, 67, 101, 183, 201, 303, 1037, 1139, 1717, 3111, 3417, 4087, 5151, 6161, 6767, 12261, 18483, 20301, 69479, 104737, 115039, 208437, 314211, 345117, 412787, 1238361, 7017379, 21052137]

約数ペア:

[(1, 21052137), (3, 7017379), (17, 1238361), (51, 412787), (61, 345117), (67, 314211), (101, 208437), (183, 115039), (201, 104737), (303, 69479), (1037, 20301), (1139, 18483), (1717, 12261), (3111, 6767), (3417, 6161), (4087, 5151)]