81281395

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{2237}}^1$

素因数の和:2311

約数の個数: 24

約数和(自身を含む): 108122256

約数和(自身を除く): 26840861

約数列:

[1, 5, 13, 43, 65, 169, 215, 559, 845, 2237, 2795, 7267, 11185, 29081, 36335, 96191, 145405, 378053, 480955, 1250483, 1890265, 6252415, 16256279, 81281395]

約数ペア:

[(1, 81281395), (5, 16256279), (13, 6252415), (43, 1890265), (65, 1250483), (169, 480955), (215, 378053), (559, 145405), (845, 96191), (2237, 36335), (2795, 29081), (7267, 11185)]