21387025

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{937}}^1$

素因数の和:1041

約数の個数: 24

約数和(自身を含む): 29310624

約数和(自身を除く): 7923599

約数列:

[1, 5, 11, 25, 55, 83, 275, 415, 913, 937, 2075, 4565, 4685, 10307, 22825, 23425, 51535, 77771, 257675, 388855, 855481, 1944275, 4277405, 21387025]

約数ペア:

[(1, 21387025), (5, 4277405), (11, 1944275), (25, 855481), (55, 388855), (83, 257675), (275, 77771), (415, 51535), (913, 23425), (937, 22825), (2075, 10307), (4565, 4685)]