28657937

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{21893}}^1$

素因数の和:21928

約数の個数: 16

約数和(自身を含む): 37832832

約数和(自身を除く): 9174895

約数列:

[1, 7, 11, 17, 77, 119, 187, 1309, 21893, 153251, 240823, 372181, 1685761, 2605267, 4093991, 28657937]

約数ペア:

[(1, 28657937), (7, 4093991), (11, 2605267), (17, 1685761), (77, 372181), (119, 240823), (187, 153251), (1309, 21893)]