20689613

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{313}}^1$

素因数の和:417

約数の個数: 24

約数和(自身を含む): 25773120

約数和(自身を除く): 5083507

約数列:

[1, 7, 19, 49, 71, 133, 313, 497, 931, 1349, 2191, 3479, 5947, 9443, 15337, 22223, 41629, 66101, 155561, 291403, 422237, 1088927, 2955659, 20689613]

約数ペア:

[(1, 20689613), (7, 2955659), (19, 1088927), (49, 422237), (71, 291403), (133, 155561), (313, 66101), (497, 41629), (931, 22223), (1349, 15337), (2191, 9443), (3479, 5947)]