21065385

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127669}}^1$

素因数の和:127688

約数の個数: 16

約数和(自身を含む): 36768960

約数和(自身を除く): 15703575

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 127669, 383007, 638345, 1404359, 1915035, 4213077, 7021795, 21065385]

約数ペア:

[(1, 21065385), (3, 7021795), (5, 4213077), (11, 1915035), (15, 1404359), (33, 638345), (55, 383007), (165, 127669)]