217470981

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{4003}}^1$

素因数の和:4225

約数の個数: 32

約数和(自身を含む): 358758400

約数和(自身を除く): 141287419

約数列:

[1, 3, 7, 13, 21, 39, 91, 199, 273, 597, 1393, 2587, 4003, 4179, 7761, 12009, 18109, 28021, 52039, 54327, 84063, 156117, 364273, 796597, 1092819, 2389791, 5576179, 10355761, 16728537, 31067283, 72490327, 217470981]

約数ペア:

[(1, 217470981), (3, 72490327), (7, 31067283), (13, 16728537), (21, 10355761), (39, 5576179), (91, 2389791), (199, 1092819), (273, 796597), (597, 364273), (1393, 156117), (2587, 84063), (4003, 54327), (4179, 52039), (7761, 28021), (12009, 18109)]