81252880

素因数分解:

$2^4\times 5^1\times {\mathrm{1015661}}^1$

素因数の和:1015674

約数の個数: 20

約数和(自身を含む): 188913132

約数和(自身を除く): 107660252

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1015661, 2031322, 4062644, 5078305, 8125288, 10156610, 16250576, 20313220, 40626440, 81252880]

約数ペア:

[(1, 81252880), (2, 40626440), (4, 20313220), (5, 16250576), (8, 10156610), (10, 8125288), (16, 5078305), (20, 4062644), (40, 2031322), (80, 1015661)]