20999913

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 33784128

約数和(自身を除く): 12784215

約数列:

[1, 3, 11, 17, 33, 41, 51, 83, 121, 123, 187, 249, 363, 451, 561, 697, 913, 1353, 1411, 2057, 2091, 2739, 3403, 4233, 4961, 6171, 7667, 10043, 10209, 14883, 15521, 23001, 30129, 37433, 46563, 57851, 84337, 112299, 170731, 173553, 253011, 411763, 512193, 636361, 1235289, 1909083, 6999971, 20999913]

約数ペア:

[(1, 20999913), (3, 6999971), (11, 1909083), (17, 1235289), (33, 636361), (41, 512193), (51, 411763), (83, 253011), (121, 173553), (123, 170731), (187, 112299), (249, 84337), (363, 57851), (451, 46563), (561, 37433), (697, 30129), (913, 23001), (1353, 15521), (1411, 14883), (2057, 10209), (2091, 10043), (2739, 7667), (3403, 6171), (4233, 4961)]