21081951

素因数分解:

$3^6\times {\mathrm{11}}^2\times {\mathrm{239}}^1$

素因数の和:279

約数の個数: 42

約数和(自身を含む): 34888560

約数和(自身を除く): 13806609

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 121, 239, 243, 297, 363, 717, 729, 891, 1089, 2151, 2629, 2673, 3267, 6453, 7887, 8019, 9801, 19359, 23661, 28919, 29403, 58077, 70983, 86757, 88209, 174231, 212949, 260271, 638847, 780813, 1916541, 2342439, 7027317, 21081951]

約数ペア:

[(1, 21081951), (3, 7027317), (9, 2342439), (11, 1916541), (27, 780813), (33, 638847), (81, 260271), (99, 212949), (121, 174231), (239, 88209), (243, 86757), (297, 70983), (363, 58077), (717, 29403), (729, 28919), (891, 23661), (1089, 19359), (2151, 9801), (2629, 8019), (2673, 7887), (3267, 6453)]