21217735

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{7873}}^1$

素因数の和:7903

約数の個数: 24

約数和(自身を含む): 32314896

約数和(自身を除く): 11097161

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 385, 539, 2695, 7873, 39365, 55111, 86603, 275555, 385777, 433015, 606221, 1928885, 3031105, 4243547, 21217735]

約数ペア:

[(1, 21217735), (5, 4243547), (7, 3031105), (11, 1928885), (35, 606221), (49, 433015), (55, 385777), (77, 275555), (245, 86603), (385, 55111), (539, 39365), (2695, 7873)]