208515640

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73421}}^1$

素因数の和:73503

約数の個数: 32

約数和(自身を含む): 475774560

約数和(自身を除く): 267258920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 73421, 146842, 293684, 367105, 587368, 734210, 1468420, 2936840, 5212891, 10425782, 20851564, 26064455, 41703128, 52128910, 104257820, 208515640]

約数ペア:

[(1, 208515640), (2, 104257820), (4, 52128910), (5, 41703128), (8, 26064455), (10, 20851564), (20, 10425782), (40, 5212891), (71, 2936840), (142, 1468420), (284, 734210), (355, 587368), (568, 367105), (710, 293684), (1420, 146842), (2840, 73421)]