639304

素因数分解:

$2^3\times {\mathrm{157}}^1\times {\mathrm{509}}^1$

素因数の和:672

約数の個数: 16

約数和(自身を含む): 1208700

約数和(自身を除く): 569396

約数列:

[1, 2, 4, 8, 157, 314, 509, 628, 1018, 1256, 2036, 4072, 79913, 159826, 319652, 639304]

約数ペア:

[(1, 639304), (2, 319652), (4, 159826), (8, 79913), (157, 4072), (314, 2036), (509, 1256), (628, 1018)]