639771838

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{373}}^1\times {\mathrm{45137}}^1$

素因数の和:45531

約数の個数: 16

約数和(自身を含む): 1012896720

約数和(自身を除く): 373124882

約数列:

[1, 2, 19, 38, 373, 746, 7087, 14174, 45137, 90274, 857603, 1715206, 16836101, 33672202, 319885919, 639771838]

約数ペア:

[(1, 639771838), (2, 319885919), (19, 33672202), (38, 16836101), (373, 1715206), (746, 857603), (7087, 90274), (14174, 45137)]