639878642

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{238939}}^1$

素因数の和:239057

約数の個数: 16

約数和(自身を含む): 1043689920

約数和(自身を除く): 403811278

約数列:

[1, 2, 13, 26, 103, 206, 1339, 2678, 238939, 477878, 3106207, 6212414, 24610717, 49221434, 319939321, 639878642]

約数ペア:

[(1, 639878642), (2, 319939321), (13, 49221434), (26, 24610717), (103, 6212414), (206, 3106207), (1339, 477878), (2678, 238939)]