20499739

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:199

約数の個数: 32

約数和(自身を含む): 25280640

約数和(自身を除く): 4780901

約数列:

[1, 13, 17, 23, 37, 109, 221, 299, 391, 481, 629, 851, 1417, 1853, 2507, 4033, 5083, 8177, 11063, 14467, 24089, 32591, 42619, 52429, 68561, 92759, 188071, 554047, 891293, 1205867, 1576903, 20499739]

約数ペア:

[(1, 20499739), (13, 1576903), (17, 1205867), (23, 891293), (37, 554047), (109, 188071), (221, 92759), (299, 68561), (391, 52429), (481, 42619), (629, 32591), (851, 24089), (1417, 14467), (1853, 11063), (2507, 8177), (4033, 5083)]