21200385

素因数分解:

$3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{10789}}^1$

素因数の和:10928

約数の個数: 16

約数和(自身を含む): 34182720

約数和(自身を除く): 12982335

約数列:

[1, 3, 5, 15, 131, 393, 655, 1965, 10789, 32367, 53945, 161835, 1413359, 4240077, 7066795, 21200385]

約数ペア:

[(1, 21200385), (3, 7066795), (5, 4240077), (15, 1413359), (131, 161835), (393, 53945), (655, 32367), (1965, 10789)]