19955200

素因数分解:

$2^9\times 5^2\times {\mathrm{1559}}^1$

素因数の和:1587

約数の個数: 60

約数和(自身を含む): 49472280

約数和(自身を除く): 29517080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 800, 1280, 1559, 1600, 2560, 3118, 3200, 6236, 6400, 7795, 12472, 12800, 15590, 24944, 31180, 38975, 49888, 62360, 77950, 99776, 124720, 155900, 199552, 249440, 311800, 399104, 498880, 623600, 798208, 997760, 1247200, 1995520, 2494400, 3991040, 4988800, 9977600, 19955200]

約数ペア:

[(1, 19955200), (2, 9977600), (4, 4988800), (5, 3991040), (8, 2494400), (10, 1995520), (16, 1247200), (20, 997760), (25, 798208), (32, 623600), (40, 498880), (50, 399104), (64, 311800), (80, 249440), (100, 199552), (128, 155900), (160, 124720), (200, 99776), (256, 77950), (320, 62360), (400, 49888), (512, 38975), (640, 31180), (800, 24944), (1280, 15590), (1559, 12800), (1600, 12472), (2560, 7795), (3118, 6400), (3200, 6236)]