1991975

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:179

約数の個数: 24

約数和(自身を含む): 2700720

約数和(自身を除く): 708745

約数列:

[1, 5, 17, 25, 43, 85, 109, 215, 425, 545, 731, 1075, 1853, 2725, 3655, 4687, 9265, 18275, 23435, 46325, 79679, 117175, 398395, 1991975]

約数ペア:

[(1, 1991975), (5, 398395), (17, 117175), (25, 79679), (43, 46325), (85, 23435), (109, 18275), (215, 9265), (425, 4687), (545, 3655), (731, 2725), (1075, 1853)]