81390290

素因数分解:

$2^1\times 5^1\times {\mathrm{349}}^1\times {\mathrm{23321}}^1$

素因数の和:23677

約数の個数: 16

約数和(自身を含む): 146928600

約数和(自身を除く): 65538310

約数列:

[1, 2, 5, 10, 349, 698, 1745, 3490, 23321, 46642, 116605, 233210, 8139029, 16278058, 40695145, 81390290]

約数ペア:

[(1, 81390290), (2, 40695145), (5, 16278058), (10, 8139029), (349, 233210), (698, 116605), (1745, 46642), (3490, 23321)]