81865251

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{521}}^1$

素因数の和:636

約数の個数: 48

約数和(自身を含む): 136805760

約数和(自身を除く): 54940509

約数列:

[1, 3, 9, 13, 17, 39, 51, 79, 117, 153, 221, 237, 521, 663, 711, 1027, 1343, 1563, 1989, 3081, 4029, 4689, 6773, 8857, 9243, 12087, 17459, 20319, 26571, 41159, 52377, 60957, 79713, 115141, 123477, 157131, 345423, 370431, 535067, 699703, 1036269, 1605201, 2099109, 4815603, 6297327, 9096139, 27288417, 81865251]

約数ペア:

[(1, 81865251), (3, 27288417), (9, 9096139), (13, 6297327), (17, 4815603), (39, 2099109), (51, 1605201), (79, 1036269), (117, 699703), (153, 535067), (221, 370431), (237, 345423), (521, 157131), (663, 123477), (711, 115141), (1027, 79713), (1343, 60957), (1563, 52377), (1989, 41159), (3081, 26571), (4029, 20319), (4689, 17459), (6773, 12087), (8857, 9243)]