21138542

素因数分解:

$2^1\times {\mathrm{43}}^1\times {\mathrm{271}}^1\times {\mathrm{907}}^1$

素因数の和:1223

約数の個数: 16

約数和(自身を含む): 32600832

約数和(自身を除く): 11462290

約数列:

[1, 2, 43, 86, 271, 542, 907, 1814, 11653, 23306, 39001, 78002, 245797, 491594, 10569271, 21138542]

約数ペア:

[(1, 21138542), (2, 10569271), (43, 491594), (86, 245797), (271, 78002), (542, 39001), (907, 23306), (1814, 11653)]