19739993

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1$

素因数の和:286

約数の個数: 32

約数和(自身を含む): 26208000

約数和(自身を除く): 6468007

約数列:

[1, 7, 13, 19, 49, 91, 133, 233, 247, 343, 637, 931, 1631, 1729, 3029, 4427, 4459, 6517, 11417, 12103, 21203, 30989, 57551, 79919, 84721, 148421, 216923, 402857, 1038947, 1518461, 2819999, 19739993]

約数ペア:

[(1, 19739993), (7, 2819999), (13, 1518461), (19, 1038947), (49, 402857), (91, 216923), (133, 148421), (233, 84721), (247, 79919), (343, 57551), (637, 30989), (931, 21203), (1631, 12103), (1729, 11417), (3029, 6517), (4427, 4459)]