81381508

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{317}}^1\times {\mathrm{4937}}^1$

素因数の和:5271

約数の個数: 24

約数和(自身を含む): 153887832

約数和(自身を除く): 72506324

約数列:

[1, 2, 4, 13, 26, 52, 317, 634, 1268, 4121, 4937, 8242, 9874, 16484, 19748, 64181, 128362, 256724, 1565029, 3130058, 6260116, 20345377, 40690754, 81381508]

約数ペア:

[(1, 81381508), (2, 40690754), (4, 20345377), (13, 6260116), (26, 3130058), (52, 1565029), (317, 256724), (634, 128362), (1268, 64181), (4121, 19748), (4937, 16484), (8242, 9874)]