20604255

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^2\times {\mathrm{97}}^1$

素因数の和:153

約数の個数: 72

約数和(自身を含む): 41157648

約数和(自身を除く): 20553393

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 97, 105, 119, 147, 245, 255, 289, 291, 357, 485, 595, 679, 735, 833, 867, 1445, 1455, 1649, 1785, 2023, 2037, 2499, 3395, 4165, 4335, 4753, 4947, 6069, 8245, 10115, 10185, 11543, 12495, 14161, 14259, 23765, 24735, 28033, 30345, 34629, 42483, 57715, 70805, 71295, 80801, 84099, 140165, 173145, 196231, 212415, 242403, 404005, 420495, 588693, 981155, 1212015, 1373617, 2943465, 4120851, 6868085, 20604255]

約数ペア:

[(1, 20604255), (3, 6868085), (5, 4120851), (7, 2943465), (15, 1373617), (17, 1212015), (21, 981155), (35, 588693), (49, 420495), (51, 404005), (85, 242403), (97, 212415), (105, 196231), (119, 173145), (147, 140165), (245, 84099), (255, 80801), (289, 71295), (291, 70805), (357, 57715), (485, 42483), (595, 34629), (679, 30345), (735, 28033), (833, 24735), (867, 23765), (1445, 14259), (1455, 14161), (1649, 12495), (1785, 11543), (2023, 10185), (2037, 10115), (2499, 8245), (3395, 6069), (4165, 4947), (4335, 4753)]