21504725

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{7109}}^1$

素因数の和:7141

約数の個数: 18

約数和(自身を含む): 29314530

約数和(自身を除く): 7809805

約数列:

[1, 5, 11, 25, 55, 121, 275, 605, 3025, 7109, 35545, 78199, 177725, 390995, 860189, 1954975, 4300945, 21504725]

約数ペア:

[(1, 21504725), (5, 4300945), (11, 1954975), (25, 860189), (55, 390995), (121, 177725), (275, 78199), (605, 35545), (3025, 7109)]