639806

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{149}}^1$

素因数の和:283

約数の個数: 16

約数和(自身を含む): 1026000

約数和(自身を除く): 386194

約数列:

[1, 2, 19, 38, 113, 149, 226, 298, 2147, 2831, 4294, 5662, 16837, 33674, 319903, 639806]

約数ペア:

[(1, 639806), (2, 319903), (19, 33674), (38, 16837), (113, 5662), (149, 4294), (226, 2831), (298, 2147)]