21989569

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{727}}^1$

素因数の和:912

約数の個数: 16

約数和(自身を含む): 26208000

約数和(自身を除く): 4218431

約数列:

[1, 7, 29, 149, 203, 727, 1043, 4321, 5089, 21083, 30247, 108323, 147581, 758261, 3141367, 21989569]

約数ペア:

[(1, 21989569), (7, 3141367), (29, 758261), (149, 147581), (203, 108323), (727, 30247), (1043, 21083), (4321, 5089)]