18991767

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:279

約数の個数: 32

約数和(自身を含む): 27929088

約数和(自身を除く): 8937321

約数列:

[1, 3, 23, 37, 43, 69, 111, 129, 173, 519, 851, 989, 1591, 2553, 2967, 3979, 4773, 6401, 7439, 11937, 19203, 22317, 36593, 109779, 147223, 171097, 275243, 441669, 513291, 825729, 6330589, 18991767]

約数ペア:

[(1, 18991767), (3, 6330589), (23, 825729), (37, 513291), (43, 441669), (69, 275243), (111, 171097), (129, 147223), (173, 109779), (519, 36593), (851, 22317), (989, 19203), (1591, 11937), (2553, 7439), (2967, 6401), (3979, 4773)]