81280563

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{42533}}^1$

素因数の和:42563

約数の個数: 24

約数和(自身を含む): 135768528

約数和(自身を除く): 54487965

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911, 42533, 127599, 297731, 552929, 893193, 1658787, 2084117, 3870503, 6252351, 11611509, 27093521, 81280563]

約数ペア:

[(1, 81280563), (3, 27093521), (7, 11611509), (13, 6252351), (21, 3870503), (39, 2084117), (49, 1658787), (91, 893193), (147, 552929), (273, 297731), (637, 127599), (1911, 42533)]