20400765

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1039}}^1$

素因数の和:1082

約数の個数: 64

約数和(自身を含む): 43130880

約数和(自身を除く): 22730115

約数列:

[1, 3, 5, 7, 11, 15, 17, 21, 33, 35, 51, 55, 77, 85, 105, 119, 165, 187, 231, 255, 357, 385, 561, 595, 935, 1039, 1155, 1309, 1785, 2805, 3117, 3927, 5195, 6545, 7273, 11429, 15585, 17663, 19635, 21819, 34287, 36365, 52989, 57145, 80003, 88315, 109095, 123641, 171435, 194293, 240009, 264945, 370923, 400015, 582879, 618205, 971465, 1200045, 1360051, 1854615, 2914395, 4080153, 6800255, 20400765]

約数ペア:

[(1, 20400765), (3, 6800255), (5, 4080153), (7, 2914395), (11, 1854615), (15, 1360051), (17, 1200045), (21, 971465), (33, 618205), (35, 582879), (51, 400015), (55, 370923), (77, 264945), (85, 240009), (105, 194293), (119, 171435), (165, 123641), (187, 109095), (231, 88315), (255, 80003), (357, 57145), (385, 52989), (561, 36365), (595, 34287), (935, 21819), (1039, 19635), (1155, 17663), (1309, 15585), (1785, 11429), (2805, 7273), (3117, 6545), (3927, 5195)]