21369509

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:201

約数の個数: 32

約数和(自身を含む): 27279360

約数和(自身を除く): 5909851

約数列:

[1, 7, 19, 31, 71, 73, 133, 217, 497, 511, 589, 1349, 1387, 2201, 2263, 4123, 5183, 9443, 9709, 15407, 15841, 36281, 41819, 42997, 98477, 160673, 292733, 300979, 689339, 1124711, 3052787, 21369509]

約数ペア:

[(1, 21369509), (7, 3052787), (19, 1124711), (31, 689339), (71, 300979), (73, 292733), (133, 160673), (217, 98477), (497, 42997), (511, 41819), (589, 36281), (1349, 15841), (1387, 15407), (2201, 9709), (2263, 9443), (4123, 5183)]