21018021284

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{404192717}}^1$

素因数の和:404192734

約数の個数: 12

約数和(自身を含む): 39610886364

約数和(自身を除く): 18592865080

約数列:

[1, 2, 4, 13, 26, 52, 404192717, 808385434, 1616770868, 5254505321, 10509010642, 21018021284]

約数ペア:

[(1, 21018021284), (2, 10509010642), (4, 5254505321), (13, 1616770868), (26, 808385434), (52, 404192717)]