18705015

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{499}}^1$

素因数の和:541

約数の個数: 72

約数和(自身を含む): 40014000

約数和(自身を除く): 21308985

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 49, 51, 63, 85, 105, 119, 147, 153, 245, 255, 315, 357, 441, 499, 595, 735, 765, 833, 1071, 1497, 1785, 2205, 2495, 2499, 3493, 4165, 4491, 5355, 7485, 7497, 8483, 10479, 12495, 17465, 22455, 24451, 25449, 31437, 37485, 42415, 52395, 59381, 73353, 76347, 122255, 127245, 157185, 178143, 220059, 296905, 366765, 381735, 415667, 534429, 890715, 1100295, 1247001, 2078335, 2672145, 3741003, 6235005, 18705015]

約数ペア:

[(1, 18705015), (3, 6235005), (5, 3741003), (7, 2672145), (9, 2078335), (15, 1247001), (17, 1100295), (21, 890715), (35, 534429), (45, 415667), (49, 381735), (51, 366765), (63, 296905), (85, 220059), (105, 178143), (119, 157185), (147, 127245), (153, 122255), (245, 76347), (255, 73353), (315, 59381), (357, 52395), (441, 42415), (499, 37485), (595, 31437), (735, 25449), (765, 24451), (833, 22455), (1071, 17465), (1497, 12495), (1785, 10479), (2205, 8483), (2495, 7497), (2499, 7485), (3493, 5355), (4165, 4491)]