21288135

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{317}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 38572128

約数和(自身を除く): 17283993

約数列:

[1, 3, 5, 11, 15, 33, 37, 55, 111, 121, 165, 185, 317, 363, 407, 555, 605, 951, 1221, 1585, 1815, 2035, 3487, 4477, 4755, 6105, 10461, 11729, 13431, 17435, 22385, 35187, 38357, 52305, 58645, 67155, 115071, 129019, 175935, 191785, 387057, 575355, 645095, 1419209, 1935285, 4257627, 7096045, 21288135]

約数ペア:

[(1, 21288135), (3, 7096045), (5, 4257627), (11, 1935285), (15, 1419209), (33, 645095), (37, 575355), (55, 387057), (111, 191785), (121, 175935), (165, 129019), (185, 115071), (317, 67155), (363, 58645), (407, 52305), (555, 38357), (605, 35187), (951, 22385), (1221, 17435), (1585, 13431), (1815, 11729), (2035, 10461), (3487, 6105), (4477, 4755)]