20756421

素因数分解:

$3^2\times 7^1\times {\mathrm{571}}^1\times {\mathrm{577}}^1$

素因数の和:1161

約数の個数: 24

約数和(自身を含む): 34384064

約数和(自身を除く): 13627643

約数列:

[1, 3, 7, 9, 21, 63, 571, 577, 1713, 1731, 3997, 4039, 5139, 5193, 11991, 12117, 35973, 36351, 329467, 988401, 2306269, 2965203, 6918807, 20756421]

約数ペア:

[(1, 20756421), (3, 6918807), (7, 2965203), (9, 2306269), (21, 988401), (63, 329467), (571, 36351), (577, 35973), (1713, 12117), (1731, 11991), (3997, 5193), (4039, 5139)]