19981444

素因数分解:

$2^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{6547}}^1$

素因数の和:6667

約数の個数: 24

約数和(自身を含む): 40335680

約数和(自身を除く): 20354236

約数列:

[1, 2, 4, 7, 14, 28, 109, 218, 436, 763, 1526, 3052, 6547, 13094, 26188, 45829, 91658, 183316, 713623, 1427246, 2854492, 4995361, 9990722, 19981444]

約数ペア:

[(1, 19981444), (2, 9990722), (4, 4995361), (7, 2854492), (14, 1427246), (28, 713623), (109, 183316), (218, 91658), (436, 45829), (763, 26188), (1526, 13094), (3052, 6547)]