208015905

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{263}}^1\times {\mathrm{787}}^1$

素因数の和:1125

約数の個数: 32

約数和(自身を含む): 339508224

約数和(自身を除く): 131492319

約数列:

[1, 3, 5, 15, 67, 201, 263, 335, 787, 789, 1005, 1315, 2361, 3935, 3945, 11805, 17621, 52729, 52863, 88105, 158187, 206981, 263645, 264315, 620943, 790935, 1034905, 3104715, 13867727, 41603181, 69338635, 208015905]

約数ペア:

[(1, 208015905), (3, 69338635), (5, 41603181), (15, 13867727), (67, 3104715), (201, 1034905), (263, 790935), (335, 620943), (787, 264315), (789, 263645), (1005, 206981), (1315, 158187), (2361, 88105), (3935, 52863), (3945, 52729), (11805, 17621)]