81998609

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{211}}^1$

素因数の和:346

約数の個数: 32

約数和(自身を含む): 105830400

約数和(自身を除く): 23831791

約数列:

[1, 7, 11, 49, 77, 103, 211, 343, 539, 721, 1133, 1477, 2321, 3773, 5047, 7931, 10339, 16247, 21733, 35329, 55517, 72373, 113729, 152131, 239063, 388619, 796103, 1064917, 1673441, 7454419, 11714087, 81998609]

約数ペア:

[(1, 81998609), (7, 11714087), (11, 7454419), (49, 1673441), (77, 1064917), (103, 796103), (211, 388619), (343, 239063), (539, 152131), (721, 113729), (1133, 72373), (1477, 55517), (2321, 35329), (3773, 21733), (5047, 16247), (7931, 10339)]