81580779

素因数分解:

$3^2\times 7^1\times {\mathrm{487}}^1\times {\mathrm{2659}}^1$

素因数の和:3159

約数の個数: 24

約数和(自身を含む): 135000320

約数和(自身を除く): 53419541

約数列:

[1, 3, 7, 9, 21, 63, 487, 1461, 2659, 3409, 4383, 7977, 10227, 18613, 23931, 30681, 55839, 167517, 1294933, 3884799, 9064531, 11654397, 27193593, 81580779]

約数ペア:

[(1, 81580779), (3, 27193593), (7, 11654397), (9, 9064531), (21, 3884799), (63, 1294933), (487, 167517), (1461, 55839), (2659, 30681), (3409, 23931), (4383, 18613), (7977, 10227)]