81861759

素因数分解:

$3^4\times 7^1\times {\mathrm{353}}^1\times {\mathrm{409}}^1$

素因数の和:781

約数の個数: 40

約数和(自身を含む): 140495520

約数和(自身を除く): 58633761

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 353, 409, 567, 1059, 1227, 2471, 2863, 3177, 3681, 7413, 8589, 9531, 11043, 22239, 25767, 28593, 33129, 66717, 77301, 144377, 200151, 231903, 433131, 1010639, 1299393, 3031917, 3898179, 9095751, 11694537, 27287253, 81861759]

約数ペア:

[(1, 81861759), (3, 27287253), (7, 11694537), (9, 9095751), (21, 3898179), (27, 3031917), (63, 1299393), (81, 1010639), (189, 433131), (353, 231903), (409, 200151), (567, 144377), (1059, 77301), (1227, 66717), (2471, 33129), (2863, 28593), (3177, 25767), (3681, 22239), (7413, 11043), (8589, 9531)]