21247055

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{3931}}^1$

素因数の和:4006

約数の個数: 16

約数和(自身を含む): 27177984

約数和(自身を除く): 5930929

約数列:

[1, 5, 23, 47, 115, 235, 1081, 3931, 5405, 19655, 90413, 184757, 452065, 923785, 4249411, 21247055]

約数ペア:

[(1, 21247055), (5, 4249411), (23, 923785), (47, 452065), (115, 184757), (235, 90413), (1081, 19655), (3931, 5405)]