20706561

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{419}}^1$

素因数の和:478

約数の個数: 36

約数和(自身を含む): 33524400

約数和(自身を除く): 12817839

約数列:

[1, 3, 9, 17, 19, 51, 57, 153, 171, 289, 323, 419, 867, 969, 1257, 2601, 2907, 3771, 5491, 7123, 7961, 16473, 21369, 23883, 49419, 64107, 71649, 121091, 135337, 363273, 406011, 1089819, 1218033, 2300729, 6902187, 20706561]

約数ペア:

[(1, 20706561), (3, 6902187), (9, 2300729), (17, 1218033), (19, 1089819), (51, 406011), (57, 363273), (153, 135337), (171, 121091), (289, 71649), (323, 64107), (419, 49419), (867, 23883), (969, 21369), (1257, 16473), (2601, 7961), (2907, 7123), (3771, 5491)]