20887917

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^2\times {\mathrm{487}}^1$

素因数の和:565

約数の個数: 24

約数和(自身を含む): 30603456

約数和(自身を除く): 9715539

約数列:

[1, 3, 17, 29, 51, 87, 487, 493, 841, 1461, 1479, 2523, 8279, 14123, 14297, 24837, 42369, 42891, 240091, 409567, 720273, 1228701, 6962639, 20887917]

約数ペア:

[(1, 20887917), (3, 6962639), (17, 1228701), (29, 720273), (51, 409567), (87, 240091), (487, 42891), (493, 42369), (841, 24837), (1461, 14297), (1479, 14123), (2523, 8279)]