640118

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{281}}^1$

素因数の和:367

約数の個数: 16

約数和(自身を含む): 1035504

約数和(自身を除く): 395386

約数列:

[1, 2, 17, 34, 67, 134, 281, 562, 1139, 2278, 4777, 9554, 18827, 37654, 320059, 640118]

約数ペア:

[(1, 640118), (2, 320059), (17, 37654), (34, 18827), (67, 9554), (134, 4777), (281, 2278), (562, 1139)]