51954400

素因数分解:

$2^5\times 5^2\times {\mathrm{101}}^1\times {\mathrm{643}}^1$

素因数の和:764

約数の個数: 72

約数和(自身を含む): 128288664

約数和(自身を除く): 76334264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 101, 160, 200, 202, 400, 404, 505, 643, 800, 808, 1010, 1286, 1616, 2020, 2525, 2572, 3215, 3232, 4040, 5050, 5144, 6430, 8080, 10100, 10288, 12860, 16075, 16160, 20200, 20576, 25720, 32150, 40400, 51440, 64300, 64943, 80800, 102880, 128600, 129886, 257200, 259772, 324715, 514400, 519544, 649430, 1039088, 1298860, 1623575, 2078176, 2597720, 3247150, 5195440, 6494300, 10390880, 12988600, 25977200, 51954400]

約数ペア:

[(1, 51954400), (2, 25977200), (4, 12988600), (5, 10390880), (8, 6494300), (10, 5195440), (16, 3247150), (20, 2597720), (25, 2078176), (32, 1623575), (40, 1298860), (50, 1039088), (80, 649430), (100, 519544), (101, 514400), (160, 324715), (200, 259772), (202, 257200), (400, 129886), (404, 128600), (505, 102880), (643, 80800), (800, 64943), (808, 64300), (1010, 51440), (1286, 40400), (1616, 32150), (2020, 25720), (2525, 20576), (2572, 20200), (3215, 16160), (3232, 16075), (4040, 12860), (5050, 10288), (5144, 10100), (6430, 8080)]