21155211

素因数分解:

$3^2\times 7^4\times {\mathrm{11}}^1\times {\mathrm{89}}^1$

素因数の和:134

約数の個数: 60

約数和(自身を含む): 39326040

約数和(自身を除く): 18170829

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 89, 99, 147, 231, 267, 343, 441, 539, 623, 693, 801, 979, 1029, 1617, 1869, 2401, 2937, 3087, 3773, 4361, 4851, 5607, 6853, 7203, 8811, 11319, 13083, 20559, 21609, 26411, 30527, 33957, 39249, 47971, 61677, 79233, 91581, 143913, 213689, 237699, 274743, 335797, 431739, 641067, 1007391, 1923201, 2350579, 3022173, 7051737, 21155211]

約数ペア:

[(1, 21155211), (3, 7051737), (7, 3022173), (9, 2350579), (11, 1923201), (21, 1007391), (33, 641067), (49, 431739), (63, 335797), (77, 274743), (89, 237699), (99, 213689), (147, 143913), (231, 91581), (267, 79233), (343, 61677), (441, 47971), (539, 39249), (623, 33957), (693, 30527), (801, 26411), (979, 21609), (1029, 20559), (1617, 13083), (1869, 11319), (2401, 8811), (2937, 7203), (3087, 6853), (3773, 5607), (4361, 4851)]