21475881

素因数分解:

$3^3\times 7^1\times {\mathrm{199}}^1\times {\mathrm{571}}^1$

素因数の和:786

約数の個数: 32

約数和(自身を含む): 36608000

約数和(自身を除く): 15132119

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 199, 571, 597, 1393, 1713, 1791, 3997, 4179, 5139, 5373, 11991, 12537, 15417, 35973, 37611, 107919, 113629, 340887, 795403, 1022661, 2386209, 3067983, 7158627, 21475881]

約数ペア:

[(1, 21475881), (3, 7158627), (7, 3067983), (9, 2386209), (21, 1022661), (27, 795403), (63, 340887), (189, 113629), (199, 107919), (571, 37611), (597, 35973), (1393, 15417), (1713, 12537), (1791, 11991), (3997, 5373), (4179, 5139)]