19781937

素因数分解:

$3^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{1447}}^1$

素因数の和:1498

約数の個数: 36

約数和(自身を含む): 34334976

約数和(自身を除く): 14553039

約数列:

[1, 3, 7, 9, 21, 31, 49, 63, 93, 147, 217, 279, 441, 651, 1447, 1519, 1953, 4341, 4557, 10129, 13023, 13671, 30387, 44857, 70903, 91161, 134571, 212709, 313999, 403713, 638127, 941997, 2197993, 2825991, 6593979, 19781937]

約数ペア:

[(1, 19781937), (3, 6593979), (7, 2825991), (9, 2197993), (21, 941997), (31, 638127), (49, 403713), (63, 313999), (93, 212709), (147, 134571), (217, 91161), (279, 70903), (441, 44857), (651, 30387), (1447, 13671), (1519, 13023), (1953, 10129), (4341, 4557)]