21171213

素因数分解:

$3^4\times 7^1\times {\mathrm{37339}}^1$

素因数の和:37358

約数の個数: 20

約数和(自身を含む): 36145120

約数和(自身を除く): 14973907

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37339, 112017, 261373, 336051, 784119, 1008153, 2352357, 3024459, 7057071, 21171213]

約数ペア:

[(1, 21171213), (3, 7057071), (7, 3024459), (9, 2352357), (21, 1008153), (27, 784119), (63, 336051), (81, 261373), (189, 112017), (567, 37339)]