81581787

素因数分解:

$3^2\times 7^1\times {\mathrm{53}}^2\times {\mathrm{461}}^1$

素因数の和:580

約数の個数: 36

約数和(自身を含む): 137561424

約数和(自身を除く): 55979637

約数列:

[1, 3, 7, 9, 21, 53, 63, 159, 371, 461, 477, 1113, 1383, 2809, 3227, 3339, 4149, 8427, 9681, 19663, 24433, 25281, 29043, 58989, 73299, 171031, 176967, 219897, 513093, 1294949, 1539279, 3884847, 9064643, 11654541, 27193929, 81581787]

約数ペア:

[(1, 81581787), (3, 27193929), (7, 11654541), (9, 9064643), (21, 3884847), (53, 1539279), (63, 1294949), (159, 513093), (371, 219897), (461, 176967), (477, 171031), (1113, 73299), (1383, 58989), (2809, 29043), (3227, 25281), (3339, 24433), (4149, 19663), (8427, 9681)]