21508025

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{11173}}^1$

素因数の和:11201

約数の個数: 24

約数和(自身を含む): 33253824

約数和(自身を除く): 11745799

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 175, 275, 385, 1925, 11173, 55865, 78211, 122903, 279325, 391055, 614515, 860321, 1955275, 3072575, 4301605, 21508025]

約数ペア:

[(1, 21508025), (5, 4301605), (7, 3072575), (11, 1955275), (25, 860321), (35, 614515), (55, 391055), (77, 279325), (175, 122903), (275, 78211), (385, 55865), (1925, 11173)]