21664780

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{8269}}^1$

素因数の和:8409

約数の個数: 24

約数和(自身を含む): 45848880

約数和(自身を除く): 24184100

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 8269, 16538, 33076, 41345, 82690, 165380, 1083239, 2166478, 4332956, 5416195, 10832390, 21664780]

約数ペア:

[(1, 21664780), (2, 10832390), (4, 5416195), (5, 4332956), (10, 2166478), (20, 1083239), (131, 165380), (262, 82690), (524, 41345), (655, 33076), (1310, 16538), (2620, 8269)]