21039956

素因数分解:

$2^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{8443}}^1$

素因数の和:8543

約数の個数: 24

約数和(自身を含む): 42557760

約数和(自身を除く): 21517804

約数列:

[1, 2, 4, 7, 14, 28, 89, 178, 356, 623, 1246, 2492, 8443, 16886, 33772, 59101, 118202, 236404, 751427, 1502854, 3005708, 5259989, 10519978, 21039956]

約数ペア:

[(1, 21039956), (2, 10519978), (4, 5259989), (7, 3005708), (14, 1502854), (28, 751427), (89, 236404), (178, 118202), (356, 59101), (623, 33772), (1246, 16886), (2492, 8443)]