81669640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157057}}^1$

素因数の和:157081

約数の個数: 32

約数和(自身を含む): 197893080

約数和(自身を除く): 116223440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 157057, 314114, 628228, 785285, 1256456, 1570570, 2041741, 3141140, 4083482, 6282280, 8166964, 10208705, 16333928, 20417410, 40834820, 81669640]

約数ペア:

[(1, 81669640), (2, 40834820), (4, 20417410), (5, 16333928), (8, 10208705), (10, 8166964), (13, 6282280), (20, 4083482), (26, 3141140), (40, 2041741), (52, 1570570), (65, 1256456), (104, 785285), (130, 628228), (260, 314114), (520, 157057)]