18684239

素因数分解:

$7^3\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:148

約数の個数: 32

約数和(自身を含む): 23808000

約数和(自身を除く): 5123761

約数列:

[1, 7, 19, 47, 49, 61, 133, 329, 343, 427, 893, 931, 1159, 2303, 2867, 2989, 6251, 6517, 8113, 16121, 20069, 20923, 43757, 54473, 56791, 140483, 306299, 381311, 397537, 983381, 2669177, 18684239]

約数ペア:

[(1, 18684239), (7, 2669177), (19, 983381), (47, 397537), (49, 381311), (61, 306299), (133, 140483), (329, 56791), (343, 54473), (427, 43757), (893, 20923), (931, 20069), (1159, 16121), (2303, 8113), (2867, 6517), (2989, 6251)]