20805125

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{15131}}^1$

素因数の和:15157

約数の個数: 16

約数和(自身を含む): 28327104

約数和(自身を除く): 7521979

約数列:

[1, 5, 11, 25, 55, 125, 275, 1375, 15131, 75655, 166441, 378275, 832205, 1891375, 4161025, 20805125]

約数ペア:

[(1, 20805125), (5, 4161025), (11, 1891375), (25, 832205), (55, 378275), (125, 166441), (275, 75655), (1375, 15131)]