21613821

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{1279}}^1$

素因数の和:1456

約数の個数: 16

約数和(自身を含む): 29736960

約数和(自身を除く): 8123139

約数列:

[1, 3, 43, 129, 131, 393, 1279, 3837, 5633, 16899, 54997, 164991, 167549, 502647, 7204607, 21613821]

約数ペア:

[(1, 21613821), (3, 7204607), (43, 502647), (129, 167549), (131, 164991), (393, 54997), (1279, 16899), (3837, 5633)]