20519289

素因数分解:

$3^2\times 7^3\times {\mathrm{17}}^2\times {\mathrm{23}}^1$

素因数の和:84

約数の個数: 72

約数和(自身を含む): 38313600

約数和(自身を除く): 17794311

約数列:

[1, 3, 7, 9, 17, 21, 23, 49, 51, 63, 69, 119, 147, 153, 161, 207, 289, 343, 357, 391, 441, 483, 833, 867, 1029, 1071, 1127, 1173, 1449, 2023, 2499, 2601, 2737, 3087, 3381, 3519, 5831, 6069, 6647, 7497, 7889, 8211, 10143, 14161, 17493, 18207, 19159, 19941, 23667, 24633, 42483, 46529, 52479, 57477, 59823, 71001, 99127, 127449, 134113, 139587, 172431, 297381, 325703, 402339, 418761, 892143, 977109, 1207017, 2279921, 2931327, 6839763, 20519289]

約数ペア:

[(1, 20519289), (3, 6839763), (7, 2931327), (9, 2279921), (17, 1207017), (21, 977109), (23, 892143), (49, 418761), (51, 402339), (63, 325703), (69, 297381), (119, 172431), (147, 139587), (153, 134113), (161, 127449), (207, 99127), (289, 71001), (343, 59823), (357, 57477), (391, 52479), (441, 46529), (483, 42483), (833, 24633), (867, 23667), (1029, 19941), (1071, 19159), (1127, 18207), (1173, 17493), (1449, 14161), (2023, 10143), (2499, 8211), (2601, 7889), (2737, 7497), (3087, 6647), (3381, 6069), (3519, 5831)]