31111280

素因数分解:

$2^4\times 5^1\times {\mathrm{388891}}^1$

素因数の和:388904

約数の個数: 20

約数和(自身を含む): 72333912

約数和(自身を除く): 41222632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 388891, 777782, 1555564, 1944455, 3111128, 3888910, 6222256, 7777820, 15555640, 31111280]

約数ペア:

[(1, 31111280), (2, 15555640), (4, 7777820), (5, 6222256), (8, 3888910), (10, 3111128), (16, 1944455), (20, 1555564), (40, 777782), (80, 388891)]