81541280

素因数分解:

$2^5\times 5^1\times {\mathrm{509633}}^1$

素因数の和:509648

約数の個数: 24

約数和(自身を含む): 192641652

約数和(自身を除く): 111100372

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 509633, 1019266, 2038532, 2548165, 4077064, 5096330, 8154128, 10192660, 16308256, 20385320, 40770640, 81541280]

約数ペア:

[(1, 81541280), (2, 40770640), (4, 20385320), (5, 16308256), (8, 10192660), (10, 8154128), (16, 5096330), (20, 4077064), (32, 2548165), (40, 2038532), (80, 1019266), (160, 509633)]