639778874

素因数分解:

$2^1\times 7^1\times {\mathrm{1237}}^1\times {\mathrm{36943}}^1$

素因数の和:38189

約数の個数: 16

約数和(自身を含む): 1097680128

約数和(自身を除く): 457901254

約数列:

[1, 2, 7, 14, 1237, 2474, 8659, 17318, 36943, 73886, 258601, 517202, 45698491, 91396982, 319889437, 639778874]

約数ペア:

[(1, 639778874), (2, 319889437), (7, 91396982), (14, 45698491), (1237, 517202), (2474, 258601), (8659, 73886), (17318, 36943)]