20855919

素因数分解:

$3^1\times 7^2\times {\mathrm{337}}^1\times {\mathrm{421}}^1$

素因数の和:775

約数の個数: 24

約数和(自身を含む): 32521008

約数和(自身を除く): 11665089

約数列:

[1, 3, 7, 21, 49, 147, 337, 421, 1011, 1263, 2359, 2947, 7077, 8841, 16513, 20629, 49539, 61887, 141877, 425631, 993139, 2979417, 6951973, 20855919]

約数ペア:

[(1, 20855919), (3, 6951973), (7, 2979417), (21, 993139), (49, 425631), (147, 141877), (337, 61887), (421, 49539), (1011, 20629), (1263, 16513), (2359, 8841), (2947, 7077)]