81438561

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{199}}^1\times {\mathrm{659}}^1$

素因数の和:890

約数の個数: 32

約数和(自身を含む): 126720000

約数和(自身を除く): 45281439

約数列:

[1, 3, 9, 23, 27, 69, 199, 207, 597, 621, 659, 1791, 1977, 4577, 5373, 5931, 13731, 15157, 17793, 41193, 45471, 123579, 131141, 136413, 393423, 409239, 1180269, 3016243, 3540807, 9048729, 27146187, 81438561]

約数ペア:

[(1, 81438561), (3, 27146187), (9, 9048729), (23, 3540807), (27, 3016243), (69, 1180269), (199, 409239), (207, 393423), (597, 136413), (621, 131141), (659, 123579), (1791, 45471), (1977, 41193), (4577, 17793), (5373, 15157), (5931, 13731)]