19915315

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{2803}}^1$

素因数の和:2851

約数の個数: 24

約数和(自身を含む): 28769040

約数和(自身を除く): 8853725

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 1015, 1421, 2803, 7105, 14015, 19621, 81287, 98105, 137347, 406435, 569009, 686735, 2845045, 3983063, 19915315]

約数ペア:

[(1, 19915315), (5, 3983063), (7, 2845045), (29, 686735), (35, 569009), (49, 406435), (145, 137347), (203, 98105), (245, 81287), (1015, 19621), (1421, 14015), (2803, 7105)]