18865385

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2579}}^1$

素因数の和:2621

約数の個数: 32

約数和(自身を含む): 29721600

約数和(自身を除く): 10856215

約数列:

[1, 5, 7, 11, 19, 35, 55, 77, 95, 133, 209, 385, 665, 1045, 1463, 2579, 7315, 12895, 18053, 28369, 49001, 90265, 141845, 198583, 245005, 343007, 539011, 992915, 1715035, 2695055, 3773077, 18865385]

約数ペア:

[(1, 18865385), (5, 3773077), (7, 2695055), (11, 1715035), (19, 992915), (35, 539011), (55, 343007), (77, 245005), (95, 198583), (133, 141845), (209, 90265), (385, 49001), (665, 28369), (1045, 18053), (1463, 12895), (2579, 7315)]