21019515

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{313}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 38086944

約数和(自身を除く): 17067429

約数列:

[1, 3, 5, 11, 15, 33, 37, 55, 111, 121, 165, 185, 313, 363, 407, 555, 605, 939, 1221, 1565, 1815, 2035, 3443, 4477, 4695, 6105, 10329, 11581, 13431, 17215, 22385, 34743, 37873, 51645, 57905, 67155, 113619, 127391, 173715, 189365, 382173, 568095, 636955, 1401301, 1910865, 4203903, 7006505, 21019515]

約数ペア:

[(1, 21019515), (3, 7006505), (5, 4203903), (11, 1910865), (15, 1401301), (33, 636955), (37, 568095), (55, 382173), (111, 189365), (121, 173715), (165, 127391), (185, 113619), (313, 67155), (363, 57905), (407, 51645), (555, 37873), (605, 34743), (939, 22385), (1221, 17215), (1565, 13431), (1815, 11581), (2035, 10329), (3443, 6105), (4477, 4695)]