21449211

素因数分解:

$3^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{1847}}^1$

素因数の和:1943

約数の個数: 24

約数和(自身を含む): 33707520

約数和(自身を除く): 12258309

約数列:

[1, 3, 7, 21, 49, 79, 147, 237, 553, 1659, 1847, 3871, 5541, 11613, 12929, 38787, 90503, 145913, 271509, 437739, 1021391, 3064173, 7149737, 21449211]

約数ペア:

[(1, 21449211), (3, 7149737), (7, 3064173), (21, 1021391), (49, 437739), (79, 271509), (147, 145913), (237, 90503), (553, 38787), (1659, 12929), (1847, 11613), (3871, 5541)]