251440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{449}}^1$

素因数の和:469

約数の個数: 40

約数和(自身を含む): 669600

約数和(自身を除く): 418160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 449, 560, 898, 1796, 2245, 3143, 3592, 4490, 6286, 7184, 8980, 12572, 15715, 17960, 25144, 31430, 35920, 50288, 62860, 125720, 251440]

約数ペア:

[(1, 251440), (2, 125720), (4, 62860), (5, 50288), (7, 35920), (8, 31430), (10, 25144), (14, 17960), (16, 15715), (20, 12572), (28, 8980), (35, 7184), (40, 6286), (56, 4490), (70, 3592), (80, 3143), (112, 2245), (140, 1796), (280, 898), (449, 560)]