21866225

素因数分解:

$5^2\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{127}}^1$

素因数の和:305

約数の個数: 24

約数和(自身を含む): 27998208

約数和(自身を除く): 6131983

約数列:

[1, 5, 25, 71, 97, 127, 355, 485, 635, 1775, 2425, 3175, 6887, 9017, 12319, 34435, 45085, 61595, 172175, 225425, 307975, 874649, 4373245, 21866225]

約数ペア:

[(1, 21866225), (5, 4373245), (25, 874649), (71, 307975), (97, 225425), (127, 172175), (355, 61595), (485, 45085), (635, 34435), (1775, 12319), (2425, 9017), (3175, 6887)]