21502971

素因数分解:

$3^2\times 7^1\times {\mathrm{191}}^1\times {\mathrm{1787}}^1$

素因数の和:1991

約数の個数: 24

約数和(自身を含む): 35702784

約数和(自身を除く): 14199813

約数列:

[1, 3, 7, 9, 21, 63, 191, 573, 1337, 1719, 1787, 4011, 5361, 12033, 12509, 16083, 37527, 112581, 341317, 1023951, 2389219, 3071853, 7167657, 21502971]

約数ペア:

[(1, 21502971), (3, 7167657), (7, 3071853), (9, 2389219), (21, 1023951), (63, 341317), (191, 112581), (573, 37527), (1337, 16083), (1719, 12509), (1787, 12033), (4011, 5361)]