21080169

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{401}}^1$

素因数の和:483

約数の個数: 40

約数和(自身を含む): 35022240

約数和(自身を除く): 13942071

約数列:

[1, 3, 9, 11, 27, 33, 59, 81, 99, 177, 297, 401, 531, 649, 891, 1203, 1593, 1947, 3609, 4411, 4779, 5841, 10827, 13233, 17523, 23659, 32481, 39699, 52569, 70977, 119097, 212931, 260249, 357291, 638793, 780747, 1916379, 2342241, 7026723, 21080169]

約数ペア:

[(1, 21080169), (3, 7026723), (9, 2342241), (11, 1916379), (27, 780747), (33, 638793), (59, 357291), (81, 260249), (99, 212931), (177, 119097), (297, 70977), (401, 52569), (531, 39699), (649, 32481), (891, 23659), (1203, 17523), (1593, 13233), (1947, 10827), (3609, 5841), (4411, 4779)]