21878991

素因数分解:

$3^5\times {\mathrm{179}}^1\times {\mathrm{503}}^1$

素因数の和:697

約数の個数: 24

約数和(自身を含む): 33022080

約数和(自身を除く): 11143089

約数列:

[1, 3, 9, 27, 81, 179, 243, 503, 537, 1509, 1611, 4527, 4833, 13581, 14499, 40743, 43497, 90037, 122229, 270111, 810333, 2430999, 7292997, 21878991]

約数ペア:

[(1, 21878991), (3, 7292997), (9, 2430999), (27, 810333), (81, 270111), (179, 122229), (243, 90037), (503, 43497), (537, 40743), (1509, 14499), (1611, 13581), (4527, 4833)]