19904885

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:174

約数の個数: 64

約数和(自身を含む): 33191424

約数和(自身を除く): 13286539

約数列:

[1, 5, 7, 11, 13, 35, 41, 55, 65, 77, 91, 97, 143, 205, 287, 385, 451, 455, 485, 533, 679, 715, 1001, 1067, 1261, 1435, 2255, 2665, 3157, 3395, 3731, 3977, 5005, 5335, 5863, 6305, 7469, 8827, 13871, 15785, 18655, 19885, 27839, 29315, 37345, 41041, 43747, 44135, 51701, 69355, 97097, 139195, 205205, 218735, 258505, 306229, 361907, 485485, 568711, 1531145, 1809535, 2843555, 3980977, 19904885]

約数ペア:

[(1, 19904885), (5, 3980977), (7, 2843555), (11, 1809535), (13, 1531145), (35, 568711), (41, 485485), (55, 361907), (65, 306229), (77, 258505), (91, 218735), (97, 205205), (143, 139195), (205, 97097), (287, 69355), (385, 51701), (451, 44135), (455, 43747), (485, 41041), (533, 37345), (679, 29315), (715, 27839), (1001, 19885), (1067, 18655), (1261, 15785), (1435, 13871), (2255, 8827), (2665, 7469), (3157, 6305), (3395, 5863), (3731, 5335), (3977, 5005)]