21728685

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{239}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 19743315

約数列:

[1, 3, 5, 11, 15, 19, 29, 33, 55, 57, 87, 95, 145, 165, 209, 239, 285, 319, 435, 551, 627, 717, 957, 1045, 1195, 1595, 1653, 2629, 2755, 3135, 3585, 4541, 4785, 6061, 6931, 7887, 8265, 13145, 13623, 18183, 20793, 22705, 30305, 34655, 39435, 49951, 68115, 76241, 90915, 103965, 131689, 149853, 228723, 249755, 381205, 395067, 658445, 749265, 1143615, 1448579, 1975335, 4345737, 7242895, 21728685]

約数ペア:

[(1, 21728685), (3, 7242895), (5, 4345737), (11, 1975335), (15, 1448579), (19, 1143615), (29, 749265), (33, 658445), (55, 395067), (57, 381205), (87, 249755), (95, 228723), (145, 149853), (165, 131689), (209, 103965), (239, 90915), (285, 76241), (319, 68115), (435, 49951), (551, 39435), (627, 34655), (717, 30305), (957, 22705), (1045, 20793), (1195, 18183), (1595, 13623), (1653, 13145), (2629, 8265), (2755, 7887), (3135, 6931), (3585, 6061), (4541, 4785)]