81400655

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{1123}}^1$

素因数の和:1263

約数の個数: 32

約数和(自身を含む): 118694400

約数和(自身を除く): 37293745

約数列:

[1, 5, 7, 19, 35, 95, 109, 133, 545, 665, 763, 1123, 2071, 3815, 5615, 7861, 10355, 14497, 21337, 39305, 72485, 106685, 122407, 149359, 612035, 746795, 856849, 2325733, 4284245, 11628665, 16280131, 81400655]

約数ペア:

[(1, 81400655), (5, 16280131), (7, 11628665), (19, 4284245), (35, 2325733), (95, 856849), (109, 746795), (133, 612035), (545, 149359), (665, 122407), (763, 106685), (1123, 72485), (2071, 39305), (3815, 21337), (5615, 14497), (7861, 10355)]