21066423

素因数分解:

$3^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{1031}}^1$

素因数の和:1187

約数の個数: 24

約数和(自身を含む): 32941440

約数和(自身を除く): 11875017

約数列:

[1, 3, 7, 21, 49, 139, 147, 417, 973, 1031, 2919, 3093, 6811, 7217, 20433, 21651, 50519, 143309, 151557, 429927, 1003163, 3009489, 7022141, 21066423]

約数ペア:

[(1, 21066423), (3, 7022141), (7, 3009489), (21, 1003163), (49, 429927), (139, 151557), (147, 143309), (417, 50519), (973, 21651), (1031, 20433), (2919, 7217), (3093, 6811)]