21578991

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1039}}^1$

素因数の和:1115

約数の個数: 32

約数和(自身を含む): 35143680

約数和(自身を除く): 13564689

約数列:

[1, 3, 7, 21, 23, 43, 69, 129, 161, 301, 483, 903, 989, 1039, 2967, 3117, 6923, 7273, 20769, 21819, 23897, 44677, 71691, 134031, 167279, 312739, 501837, 938217, 1027571, 3082713, 7192997, 21578991]

約数ペア:

[(1, 21578991), (3, 7192997), (7, 3082713), (21, 1027571), (23, 938217), (43, 501837), (69, 312739), (129, 167279), (161, 134031), (301, 71691), (483, 44677), (903, 23897), (989, 21819), (1039, 20769), (2967, 7273), (3117, 6923)]