131193531

素因数分解:

$3^2\times 7^2\times {\mathrm{521}}^1\times {\mathrm{571}}^1$

素因数の和:1112

約数の個数: 36

約数和(自身を含む): 221250744

約数和(自身を除く): 90057213

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 521, 571, 1563, 1713, 3647, 3997, 4689, 5139, 10941, 11991, 25529, 27979, 32823, 35973, 76587, 83937, 229761, 251811, 297491, 892473, 2082437, 2677419, 6247311, 14577059, 18741933, 43731177, 131193531]

約数ペア:

[(1, 131193531), (3, 43731177), (7, 18741933), (9, 14577059), (21, 6247311), (49, 2677419), (63, 2082437), (147, 892473), (441, 297491), (521, 251811), (571, 229761), (1563, 83937), (1713, 76587), (3647, 35973), (3997, 32823), (4689, 27979), (5139, 25529), (10941, 11991)]