21405159

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{4513}}^1$

素因数の和:4567

約数の個数: 24

約数和(自身を含む): 33800832

約数和(自身を除く): 12395673

約数列:

[1, 3, 9, 17, 31, 51, 93, 153, 279, 527, 1581, 4513, 4743, 13539, 40617, 76721, 139903, 230163, 419709, 690489, 1259127, 2378351, 7135053, 21405159]

約数ペア:

[(1, 21405159), (3, 7135053), (9, 2378351), (17, 1259127), (31, 690489), (51, 419709), (93, 230163), (153, 139903), (279, 76721), (527, 40617), (1581, 13539), (4513, 4743)]