64781380

素因数分解:

$2^2\times 5^1\times {\mathrm{349}}^1\times {\mathrm{9281}}^1$

素因数の和:9639

約数の個数: 24

約数和(自身を含む): 136445400

約数和(自身を除く): 71664020

約数列:

[1, 2, 4, 5, 10, 20, 349, 698, 1396, 1745, 3490, 6980, 9281, 18562, 37124, 46405, 92810, 185620, 3239069, 6478138, 12956276, 16195345, 32390690, 64781380]

約数ペア:

[(1, 64781380), (2, 32390690), (4, 16195345), (5, 12956276), (10, 6478138), (20, 3239069), (349, 185620), (698, 92810), (1396, 46405), (1745, 37124), (3490, 18562), (6980, 9281)]