21188028

素因数分解:

$2^2\times 3^1\times {\mathrm{521}}^1\times {\mathrm{3389}}^1$

素因数の和:3917

約数の個数: 24

約数和(自身を含む): 49548240

約数和(自身を除く): 28360212

約数列:

[1, 2, 3, 4, 6, 12, 521, 1042, 1563, 2084, 3126, 3389, 6252, 6778, 10167, 13556, 20334, 40668, 1765669, 3531338, 5297007, 7062676, 10594014, 21188028]

約数ペア:

[(1, 21188028), (2, 10594014), (3, 7062676), (4, 5297007), (6, 3531338), (12, 1765669), (521, 40668), (1042, 20334), (1563, 13556), (2084, 10167), (3126, 6778), (3389, 6252)]