21131055

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42689}}^1$

素因数の和:42711

約数の個数: 24

約数和(自身を含む): 39957840

約数和(自身を除く): 18826785

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42689, 128067, 213445, 384201, 469579, 640335, 1408737, 1921005, 2347895, 4226211, 7043685, 21131055]

約数ペア:

[(1, 21131055), (3, 7043685), (5, 4226211), (9, 2347895), (11, 1921005), (15, 1408737), (33, 640335), (45, 469579), (55, 384201), (99, 213445), (165, 128067), (495, 42689)]