21840003

素因数分解:

$3^3\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1$

素因数の和:340

約数の個数: 32

約数和(自身を含む): 33633600

約数和(自身を除く): 11793597

約数列:

[1, 3, 9, 27, 41, 109, 123, 181, 327, 369, 543, 981, 1107, 1629, 2943, 4469, 4887, 7421, 13407, 19729, 22263, 40221, 59187, 66789, 120663, 177561, 200367, 532683, 808889, 2426667, 7280001, 21840003]

約数ペア:

[(1, 21840003), (3, 7280001), (9, 2426667), (27, 808889), (41, 532683), (109, 200367), (123, 177561), (181, 120663), (327, 66789), (369, 59187), (543, 40221), (981, 22263), (1107, 19729), (1629, 13407), (2943, 7421), (4469, 4887)]