21091671

素因数分解:

$3^5\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1$

素因数の和:158

約数の個数: 48

約数和(自身を含む): 33939360

約数和(自身を除く): 12847689

約数列:

[1, 3, 9, 27, 29, 41, 73, 81, 87, 123, 219, 243, 261, 369, 657, 783, 1107, 1189, 1971, 2117, 2349, 2993, 3321, 3567, 5913, 6351, 7047, 8979, 9963, 10701, 17739, 19053, 26937, 32103, 57159, 80811, 86797, 96309, 171477, 242433, 260391, 288927, 514431, 727299, 781173, 2343519, 7030557, 21091671]

約数ペア:

[(1, 21091671), (3, 7030557), (9, 2343519), (27, 781173), (29, 727299), (41, 514431), (73, 288927), (81, 260391), (87, 242433), (123, 171477), (219, 96309), (243, 86797), (261, 80811), (369, 57159), (657, 32103), (783, 26937), (1107, 19053), (1189, 17739), (1971, 10701), (2117, 9963), (2349, 8979), (2993, 7047), (3321, 6351), (3567, 5913)]