21080125

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{15331}}^1$

素因数の和:15357

約数の個数: 16

約数和(自身を含む): 28701504

約数和(自身を除く): 7621379

約数列:

[1, 5, 11, 25, 55, 125, 275, 1375, 15331, 76655, 168641, 383275, 843205, 1916375, 4216025, 21080125]

約数ペア:

[(1, 21080125), (5, 4216025), (11, 1916375), (25, 843205), (55, 383275), (125, 168641), (275, 76655), (1375, 15331)]