219974975

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{72719}}^1$

素因数の和:72751

約数の個数: 18

約数和(自身を含む): 299824560

約数和(自身を除く): 79849585

約数列:

[1, 5, 11, 25, 55, 121, 275, 605, 3025, 72719, 363595, 799909, 1817975, 3999545, 8798999, 19997725, 43994995, 219974975]

約数ペア:

[(1, 219974975), (5, 43994995), (11, 19997725), (25, 8798999), (55, 3999545), (121, 1817975), (275, 799909), (605, 363595), (3025, 72719)]