81421745

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{79}}^1\times {\mathrm{571}}^1$

素因数の和:693

約数の個数: 24

約数和(自身を含む): 104607360

約数和(自身を除く): 23185615

約数列:

[1, 5, 19, 79, 95, 361, 395, 571, 1501, 1805, 2855, 7505, 10849, 28519, 45109, 54245, 142595, 206131, 225545, 857071, 1030655, 4285355, 16284349, 81421745]

約数ペア:

[(1, 81421745), (5, 16284349), (19, 4285355), (79, 1030655), (95, 857071), (361, 225545), (395, 206131), (571, 142595), (1501, 54245), (1805, 45109), (2855, 28519), (7505, 10849)]