21380638

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{5147}}^1$

素因数の和:5247

約数の個数: 16

約数和(自身を含む): 33606144

約数和(自身を除く): 12225506

約数列:

[1, 2, 31, 62, 67, 134, 2077, 4154, 5147, 10294, 159557, 319114, 344849, 689698, 10690319, 21380638]

約数ペア:

[(1, 21380638), (2, 10690319), (31, 689698), (62, 344849), (67, 319114), (134, 159557), (2077, 10294), (4154, 5147)]