639280838

素因数分解:

$2^1\times 7^1\times {\mathrm{641}}^1\times {\mathrm{71237}}^1$

素因数の和:71887

約数の個数: 16

約数和(自身を含む): 1097635104

約数和(自身を除く): 458354266

約数列:

[1, 2, 7, 14, 641, 1282, 4487, 8974, 71237, 142474, 498659, 997318, 45662917, 91325834, 319640419, 639280838]

約数ペア:

[(1, 639280838), (2, 319640419), (7, 91325834), (14, 45662917), (641, 997318), (1282, 498659), (4487, 142474), (8974, 71237)]