639142

素因数分解:

$2^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:723

約数の個数: 16

約数和(自身を含む): 1112832

約数和(自身を除く): 473690

約数列:

[1, 2, 7, 14, 71, 142, 497, 643, 994, 1286, 4501, 9002, 45653, 91306, 319571, 639142]

約数ペア:

[(1, 639142), (2, 319571), (7, 91306), (14, 45653), (71, 9002), (142, 4501), (497, 1286), (643, 994)]