21237579

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{3109}}^1$

素因数の和:3152

約数の個数: 32

約数和(自身を含む): 35827200

約数和(自身を除く): 14589621

約数列:

[1, 3, 9, 11, 23, 27, 33, 69, 99, 207, 253, 297, 621, 759, 2277, 3109, 6831, 9327, 27981, 34199, 71507, 83943, 102597, 214521, 307791, 643563, 786577, 923373, 1930689, 2359731, 7079193, 21237579]

約数ペア:

[(1, 21237579), (3, 7079193), (9, 2359731), (11, 1930689), (23, 923373), (27, 786577), (33, 643563), (69, 307791), (99, 214521), (207, 102597), (253, 83943), (297, 71507), (621, 34199), (759, 27981), (2277, 9327), (3109, 6831)]