21416871

素因数分解:

$3^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{1637}}^1$

素因数の和:1743

約数の個数: 24

約数和(自身を含む): 33611760

約数和(自身を除く): 12194889

約数列:

[1, 3, 7, 21, 49, 89, 147, 267, 623, 1637, 1869, 4361, 4911, 11459, 13083, 34377, 80213, 145693, 240639, 437079, 1019851, 3059553, 7138957, 21416871]

約数ペア:

[(1, 21416871), (3, 7138957), (7, 3059553), (21, 1019851), (49, 437079), (89, 240639), (147, 145693), (267, 80213), (623, 34377), (1637, 13083), (1869, 11459), (4361, 4911)]