51182800

素因数分解:

$2^4\times 5^2\times {\mathrm{199}}^1\times {\mathrm{643}}^1$

素因数の和:860

約数の個数: 60

約数和(自身を含む): 123776800

約数和(自身を除く): 72594000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 199, 200, 398, 400, 643, 796, 995, 1286, 1592, 1990, 2572, 3184, 3215, 3980, 4975, 5144, 6430, 7960, 9950, 10288, 12860, 15920, 16075, 19900, 25720, 32150, 39800, 51440, 64300, 79600, 127957, 128600, 255914, 257200, 511828, 639785, 1023656, 1279570, 2047312, 2559140, 3198925, 5118280, 6397850, 10236560, 12795700, 25591400, 51182800]

約数ペア:

[(1, 51182800), (2, 25591400), (4, 12795700), (5, 10236560), (8, 6397850), (10, 5118280), (16, 3198925), (20, 2559140), (25, 2047312), (40, 1279570), (50, 1023656), (80, 639785), (100, 511828), (199, 257200), (200, 255914), (398, 128600), (400, 127957), (643, 79600), (796, 64300), (995, 51440), (1286, 39800), (1592, 32150), (1990, 25720), (2572, 19900), (3184, 16075), (3215, 15920), (3980, 12860), (4975, 10288), (5144, 9950), (6430, 7960)]