21259707

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{113}}^1$

素因数の和:188

約数の個数: 48

約数和(自身を含む): 35837952

約数和(自身を除く): 14578245

約数列:

[1, 3, 7, 17, 21, 31, 51, 93, 113, 119, 217, 289, 339, 357, 527, 651, 791, 867, 1581, 1921, 2023, 2373, 3503, 3689, 5763, 6069, 8959, 10509, 11067, 13447, 24521, 26877, 32657, 40341, 59551, 62713, 73563, 97971, 178653, 188139, 228599, 416857, 685797, 1012367, 1250571, 3037101, 7086569, 21259707]

約数ペア:

[(1, 21259707), (3, 7086569), (7, 3037101), (17, 1250571), (21, 1012367), (31, 685797), (51, 416857), (93, 228599), (113, 188139), (119, 178653), (217, 97971), (289, 73563), (339, 62713), (357, 59551), (527, 40341), (651, 32657), (791, 26877), (867, 24521), (1581, 13447), (1921, 11067), (2023, 10509), (2373, 8959), (3503, 6069), (3689, 5763)]