21139305

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{613}}^1$

素因数の和:662

約数の個数: 48

約数和(自身を含む): 39197760

約数和(自身を除く): 18058455

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 95, 121, 165, 209, 285, 363, 605, 613, 627, 1045, 1815, 1839, 2299, 3065, 3135, 6743, 6897, 9195, 11495, 11647, 20229, 33715, 34485, 34941, 58235, 74173, 101145, 128117, 174705, 222519, 370865, 384351, 640585, 1112595, 1409287, 1921755, 4227861, 7046435, 21139305]

約数ペア:

[(1, 21139305), (3, 7046435), (5, 4227861), (11, 1921755), (15, 1409287), (19, 1112595), (33, 640585), (55, 384351), (57, 370865), (95, 222519), (121, 174705), (165, 128117), (209, 101145), (285, 74173), (363, 58235), (605, 34941), (613, 34485), (627, 33715), (1045, 20229), (1815, 11647), (1839, 11495), (2299, 9195), (3065, 6897), (3135, 6743)]