21125665

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{3803}}^1$

素因数の和:3920

約数の個数: 16

約数和(自身を含む): 27936576

約数和(自身を除く): 6810911

約数列:

[1, 5, 11, 55, 101, 505, 1111, 3803, 5555, 19015, 41833, 209165, 384103, 1920515, 4225133, 21125665]

約数ペア:

[(1, 21125665), (5, 4225133), (11, 1920515), (55, 384103), (101, 209165), (505, 41833), (1111, 19015), (3803, 5555)]