20684223

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:157

約数の個数: 72

約数和(自身を含む): 38413440

約数和(自身を除く): 17729217

約数列:

[1, 3, 7, 9, 17, 21, 31, 49, 51, 63, 89, 93, 119, 147, 153, 217, 267, 279, 357, 441, 527, 623, 651, 801, 833, 1071, 1513, 1519, 1581, 1869, 1953, 2499, 2759, 3689, 4361, 4539, 4557, 4743, 5607, 7497, 8277, 10591, 11067, 13083, 13617, 13671, 19313, 24831, 25823, 31773, 33201, 39249, 46903, 57939, 74137, 77469, 95319, 135191, 140709, 173817, 222411, 232407, 328321, 405573, 422127, 667233, 984963, 1216719, 2298247, 2954889, 6894741, 20684223]

約数ペア:

[(1, 20684223), (3, 6894741), (7, 2954889), (9, 2298247), (17, 1216719), (21, 984963), (31, 667233), (49, 422127), (51, 405573), (63, 328321), (89, 232407), (93, 222411), (119, 173817), (147, 140709), (153, 135191), (217, 95319), (267, 77469), (279, 74137), (357, 57939), (441, 46903), (527, 39249), (623, 33201), (651, 31773), (801, 25823), (833, 24831), (1071, 19313), (1513, 13671), (1519, 13617), (1581, 13083), (1869, 11067), (1953, 10591), (2499, 8277), (2759, 7497), (3689, 5607), (4361, 4743), (4539, 4557)]