21899427

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:152

約数の個数: 48

約数和(自身を含む): 34831104

約数和(自身を除く): 12931677

約数列:

[1, 3, 11, 23, 33, 43, 61, 69, 121, 129, 183, 253, 363, 473, 671, 759, 989, 1403, 1419, 2013, 2623, 2783, 2967, 4209, 5203, 7381, 7869, 8349, 10879, 15433, 15609, 22143, 28853, 32637, 46299, 60329, 86559, 119669, 169763, 180987, 317383, 359007, 509289, 663619, 952149, 1990857, 7299809, 21899427]

約数ペア:

[(1, 21899427), (3, 7299809), (11, 1990857), (23, 952149), (33, 663619), (43, 509289), (61, 359007), (69, 317383), (121, 180987), (129, 169763), (183, 119669), (253, 86559), (363, 60329), (473, 46299), (671, 32637), (759, 28853), (989, 22143), (1403, 15609), (1419, 15433), (2013, 10879), (2623, 8349), (2783, 7869), (2967, 7381), (4209, 5203)]