19638955

素因数分解:

$5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1129}}^1$

素因数の和:1219

約数の個数: 24

約数和(自身を含む): 27825120

約数和(自身を除く): 8186165

約数列:

[1, 5, 7, 35, 49, 71, 245, 355, 497, 1129, 2485, 3479, 5645, 7903, 17395, 39515, 55321, 80159, 276605, 400795, 561113, 2805565, 3927791, 19638955]

約数ペア:

[(1, 19638955), (5, 3927791), (7, 2805565), (35, 561113), (49, 400795), (71, 276605), (245, 80159), (355, 55321), (497, 39515), (1129, 17395), (2485, 7903), (3479, 5645)]