81378020

素因数分解:

$2^2\times 5^1\times {\mathrm{433}}^1\times {\mathrm{9397}}^1$

素因数の和:9839

約数の個数: 24

約数和(自身を含む): 171306744

約数和(自身を除く): 89928724

約数列:

[1, 2, 4, 5, 10, 20, 433, 866, 1732, 2165, 4330, 8660, 9397, 18794, 37588, 46985, 93970, 187940, 4068901, 8137802, 16275604, 20344505, 40689010, 81378020]

約数ペア:

[(1, 81378020), (2, 40689010), (4, 20344505), (5, 16275604), (10, 8137802), (20, 4068901), (433, 187940), (866, 93970), (1732, 46985), (2165, 37588), (4330, 18794), (8660, 9397)]