31918689

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 53913600

約数和(自身を除く): 21994911

約数列:

[1, 3, 9, 11, 19, 33, 57, 71, 99, 171, 209, 213, 239, 627, 639, 717, 781, 1349, 1881, 2151, 2343, 2629, 4047, 4541, 7029, 7887, 12141, 13623, 14839, 16969, 23661, 40869, 44517, 49951, 50907, 133551, 149853, 152721, 186659, 322411, 449559, 559977, 967233, 1679931, 2901699, 3546521, 10639563, 31918689]

約数ペア:

[(1, 31918689), (3, 10639563), (9, 3546521), (11, 2901699), (19, 1679931), (33, 967233), (57, 559977), (71, 449559), (99, 322411), (171, 186659), (209, 152721), (213, 149853), (239, 133551), (627, 50907), (639, 49951), (717, 44517), (781, 40869), (1349, 23661), (1881, 16969), (2151, 14839), (2343, 13623), (2629, 12141), (4047, 7887), (4541, 7029)]