19991259

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{257}}^1$

素因数の和:376

約数の個数: 32

約数和(自身を含む): 30877440

約数和(自身を除く): 10886181

約数列:

[1, 3, 9, 27, 43, 67, 129, 201, 257, 387, 603, 771, 1161, 1809, 2313, 2881, 6939, 8643, 11051, 17219, 25929, 33153, 51657, 77787, 99459, 154971, 298377, 464913, 740417, 2221251, 6663753, 19991259]

約数ペア:

[(1, 19991259), (3, 6663753), (9, 2221251), (27, 740417), (43, 464913), (67, 298377), (129, 154971), (201, 99459), (257, 77787), (387, 51657), (603, 33153), (771, 25929), (1161, 17219), (1809, 11051), (2313, 8643), (2881, 6939)]