51448400

素因数分解:

$2^4\times 5^2\times {\mathrm{128621}}^1$

素因数の和:128639

約数の個数: 30

約数和(自身を含む): 123605742

約数和(自身を除く): 72157342

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 128621, 257242, 514484, 643105, 1028968, 1286210, 2057936, 2572420, 3215525, 5144840, 6431050, 10289680, 12862100, 25724200, 51448400]

約数ペア:

[(1, 51448400), (2, 25724200), (4, 12862100), (5, 10289680), (8, 6431050), (10, 5144840), (16, 3215525), (20, 2572420), (25, 2057936), (40, 1286210), (50, 1028968), (80, 643105), (100, 514484), (200, 257242), (400, 128621)]