21879459

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{659}}^1$

素因数の和:720

約数の個数: 48

約数和(自身を含む): 39536640

約数和(自身を除く): 17657181

約数列:

[1, 3, 7, 9, 17, 21, 31, 51, 63, 93, 119, 153, 217, 279, 357, 527, 651, 659, 1071, 1581, 1953, 1977, 3689, 4613, 4743, 5931, 11067, 11203, 13839, 20429, 33201, 33609, 41517, 61287, 78421, 100827, 143003, 183861, 235263, 347293, 429009, 705789, 1041879, 1287027, 2431051, 3125637, 7293153, 21879459]

約数ペア:

[(1, 21879459), (3, 7293153), (7, 3125637), (9, 2431051), (17, 1287027), (21, 1041879), (31, 705789), (51, 429009), (63, 347293), (93, 235263), (119, 183861), (153, 143003), (217, 100827), (279, 78421), (357, 61287), (527, 41517), (651, 33609), (659, 33201), (1071, 20429), (1581, 13839), (1953, 11203), (1977, 11067), (3689, 5931), (4613, 4743)]