21361175

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{449}}^1$

素因数の和:643

約数の個数: 24

約数和(自身を含む): 29127600

約数和(自身を除く): 7766425

約数列:

[1, 5, 11, 25, 55, 173, 275, 449, 865, 1903, 2245, 4325, 4939, 9515, 11225, 24695, 47575, 77677, 123475, 388385, 854447, 1941925, 4272235, 21361175]

約数ペア:

[(1, 21361175), (5, 4272235), (11, 1941925), (25, 854447), (55, 388385), (173, 123475), (275, 77677), (449, 47575), (865, 24695), (1903, 11225), (2245, 9515), (4325, 4939)]