20690397

素因数分解:

$3^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{401}}^1$

素因数の和:440

約数の個数: 60

約数和(自身を含む): 38816316

約数和(自身を除く): 18125919

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 81, 91, 117, 147, 189, 273, 351, 401, 441, 567, 637, 819, 1053, 1203, 1323, 1911, 2457, 2807, 3609, 3969, 5213, 5733, 7371, 8421, 10827, 15639, 17199, 19649, 25263, 32481, 36491, 46917, 51597, 58947, 75789, 109473, 140751, 176841, 227367, 255437, 328419, 422253, 530523, 766311, 985257, 1591569, 2298933, 2955771, 6896799, 20690397]

約数ペア:

[(1, 20690397), (3, 6896799), (7, 2955771), (9, 2298933), (13, 1591569), (21, 985257), (27, 766311), (39, 530523), (49, 422253), (63, 328419), (81, 255437), (91, 227367), (117, 176841), (147, 140751), (189, 109473), (273, 75789), (351, 58947), (401, 51597), (441, 46917), (567, 36491), (637, 32481), (819, 25263), (1053, 19649), (1203, 17199), (1323, 15639), (1911, 10827), (2457, 8421), (2807, 7371), (3609, 5733), (3969, 5213)]