64791280

素因数分解:

$2^4\times 5^1\times {\mathrm{809891}}^1$

素因数の和:809904

約数の個数: 20

約数和(自身を含む): 150639912

約数和(自身を除く): 85848632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 809891, 1619782, 3239564, 4049455, 6479128, 8098910, 12958256, 16197820, 32395640, 64791280]

約数ペア:

[(1, 64791280), (2, 32395640), (4, 16197820), (5, 12958256), (8, 8098910), (10, 6479128), (16, 4049455), (20, 3239564), (40, 1619782), (80, 809891)]