638275

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{211}}^1$

素因数の和:243

約数の個数: 18

約数和(自身を含む): 874076

約数和(自身を除く): 235801

約数列:

[1, 5, 11, 25, 55, 121, 211, 275, 605, 1055, 2321, 3025, 5275, 11605, 25531, 58025, 127655, 638275]

約数ペア:

[(1, 638275), (5, 127655), (11, 58025), (25, 25531), (55, 11605), (121, 5275), (211, 3025), (275, 2321), (605, 1055)]