81391475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{6883}}^1$

素因数の和:6947

約数の個数: 24

約数和(自身を含む): 112677312

約数和(自身を除く): 31285837

約数列:

[1, 5, 11, 25, 43, 55, 215, 275, 473, 1075, 2365, 6883, 11825, 34415, 75713, 172075, 295969, 378565, 1479845, 1892825, 3255659, 7399225, 16278295, 81391475]

約数ペア:

[(1, 81391475), (5, 16278295), (11, 7399225), (25, 3255659), (43, 1892825), (55, 1479845), (215, 378565), (275, 295969), (473, 172075), (1075, 75713), (2365, 34415), (6883, 11825)]