21631617

素因数分解:

$3^9\times 7^1\times {\mathrm{157}}^1$

素因数の和:191

約数の個数: 40

約数和(自身を含む): 37318336

約数和(自身を除く): 15686719

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 157, 189, 243, 471, 567, 729, 1099, 1413, 1701, 2187, 3297, 4239, 5103, 6561, 9891, 12717, 15309, 19683, 29673, 38151, 45927, 89019, 114453, 137781, 267057, 343359, 801171, 1030077, 2403513, 3090231, 7210539, 21631617]

約数ペア:

[(1, 21631617), (3, 7210539), (7, 3090231), (9, 2403513), (21, 1030077), (27, 801171), (63, 343359), (81, 267057), (157, 137781), (189, 114453), (243, 89019), (471, 45927), (567, 38151), (729, 29673), (1099, 19683), (1413, 15309), (1701, 12717), (2187, 9891), (3297, 6561), (4239, 5103)]