21656691

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{277}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 38510784

約数和(自身を除く): 16854093

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 73, 119, 153, 219, 277, 357, 511, 657, 831, 1071, 1241, 1533, 1939, 2493, 3723, 4599, 4709, 5817, 8687, 11169, 14127, 17451, 20221, 26061, 32963, 42381, 60663, 78183, 98889, 141547, 181989, 296667, 343757, 424641, 1031271, 1273923, 2406299, 3093813, 7218897, 21656691]

約数ペア:

[(1, 21656691), (3, 7218897), (7, 3093813), (9, 2406299), (17, 1273923), (21, 1031271), (51, 424641), (63, 343757), (73, 296667), (119, 181989), (153, 141547), (219, 98889), (277, 78183), (357, 60663), (511, 42381), (657, 32963), (831, 26061), (1071, 20221), (1241, 17451), (1533, 14127), (1939, 11169), (2493, 8687), (3723, 5817), (4599, 4709)]