21551727

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:255

約数の個数: 32

約数和(自身を含む): 31426560

約数和(自身を除く): 9874833

約数列:

[1, 3, 29, 31, 61, 87, 93, 131, 183, 393, 899, 1769, 1891, 2697, 3799, 4061, 5307, 5673, 7991, 11397, 12183, 23973, 54839, 117769, 164517, 231739, 247721, 353307, 695217, 743163, 7183909, 21551727]

約数ペア:

[(1, 21551727), (3, 7183909), (29, 743163), (31, 695217), (61, 353307), (87, 247721), (93, 231739), (131, 164517), (183, 117769), (393, 54839), (899, 23973), (1769, 12183), (1891, 11397), (2697, 7991), (3799, 5673), (4061, 5307)]