81331520

素因数分解:

$2^6\times 5^1\times {\mathrm{254161}}^1$

素因数の和:254178

約数の個数: 28

約数和(自身を含む): 193671444

約数和(自身を除く): 112339924

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 254161, 508322, 1016644, 1270805, 2033288, 2541610, 4066576, 5083220, 8133152, 10166440, 16266304, 20332880, 40665760, 81331520]

約数ペア:

[(1, 81331520), (2, 40665760), (4, 20332880), (5, 16266304), (8, 10166440), (10, 8133152), (16, 5083220), (20, 4066576), (32, 2541610), (40, 2033288), (64, 1270805), (80, 1016644), (160, 508322), (320, 254161)]