20786931

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 35418240

約数和(自身を除く): 14631309

約数列:

[1, 3, 9, 11, 19, 33, 43, 57, 99, 129, 171, 209, 257, 387, 473, 627, 771, 817, 1419, 1881, 2313, 2451, 2827, 4257, 4883, 7353, 8481, 8987, 11051, 14649, 25443, 26961, 33153, 43947, 53713, 80883, 99459, 121561, 161139, 209969, 364683, 483417, 629907, 1094049, 1889721, 2309659, 6928977, 20786931]

約数ペア:

[(1, 20786931), (3, 6928977), (9, 2309659), (11, 1889721), (19, 1094049), (33, 629907), (43, 483417), (57, 364683), (99, 209969), (129, 161139), (171, 121561), (209, 99459), (257, 80883), (387, 53713), (473, 43947), (627, 33153), (771, 26961), (817, 25443), (1419, 14649), (1881, 11051), (2313, 8987), (2451, 8481), (2827, 7353), (4257, 4883)]