20905185

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{5381}}^1$

素因数の和:5433

約数の個数: 32

約数和(自身を含む): 39267072

約数和(自身を除く): 18361887

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 105, 111, 185, 259, 555, 777, 1295, 3885, 5381, 16143, 26905, 37667, 80715, 113001, 188335, 199097, 565005, 597291, 995485, 1393679, 2986455, 4181037, 6968395, 20905185]

約数ペア:

[(1, 20905185), (3, 6968395), (5, 4181037), (7, 2986455), (15, 1393679), (21, 995485), (35, 597291), (37, 565005), (105, 199097), (111, 188335), (185, 113001), (259, 80715), (555, 37667), (777, 26905), (1295, 16143), (3885, 5381)]