81311090

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{165941}}^1$

素因数の和:165962

約数の個数: 24

約数和(自身を含む): 170256492

約数和(自身を除く): 88945402

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 165941, 331882, 829705, 1161587, 1659410, 2323174, 5807935, 8131109, 11615870, 16262218, 40655545, 81311090]

約数ペア:

[(1, 81311090), (2, 40655545), (5, 16262218), (7, 11615870), (10, 8131109), (14, 5807935), (35, 2323174), (49, 1659410), (70, 1161587), (98, 829705), (245, 331882), (490, 165941)]