81721276

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{347}}^1\times {\mathrm{647}}^1$

素因数の和:1018

約数の個数: 48

約数和(自身を含む): 176795136

約数和(自身を除く): 95073860

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 182, 347, 364, 647, 694, 1294, 1388, 2429, 2588, 4511, 4529, 4858, 8411, 9022, 9058, 9716, 16822, 18044, 18116, 31577, 33644, 58877, 63154, 117754, 126308, 224509, 235508, 449018, 898036, 1571563, 2918617, 3143126, 5837234, 6286252, 11674468, 20430319, 40860638, 81721276]

約数ペア:

[(1, 81721276), (2, 40860638), (4, 20430319), (7, 11674468), (13, 6286252), (14, 5837234), (26, 3143126), (28, 2918617), (52, 1571563), (91, 898036), (182, 449018), (347, 235508), (364, 224509), (647, 126308), (694, 117754), (1294, 63154), (1388, 58877), (2429, 33644), (2588, 31577), (4511, 18116), (4529, 18044), (4858, 16822), (8411, 9716), (9022, 9058)]