25720000

素因数分解:

$2^6\times 5^4\times {\mathrm{643}}^1$

素因数の和:675

約数の個数: 70

約数和(自身を含む): 63876428

約数和(自身を除く): 38156428

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 625, 643, 800, 1000, 1250, 1286, 1600, 2000, 2500, 2572, 3215, 4000, 5000, 5144, 6430, 8000, 10000, 10288, 12860, 16075, 20000, 20576, 25720, 32150, 40000, 41152, 51440, 64300, 80375, 102880, 128600, 160750, 205760, 257200, 321500, 401875, 514400, 643000, 803750, 1028800, 1286000, 1607500, 2572000, 3215000, 5144000, 6430000, 12860000, 25720000]

約数ペア:

[(1, 25720000), (2, 12860000), (4, 6430000), (5, 5144000), (8, 3215000), (10, 2572000), (16, 1607500), (20, 1286000), (25, 1028800), (32, 803750), (40, 643000), (50, 514400), (64, 401875), (80, 321500), (100, 257200), (125, 205760), (160, 160750), (200, 128600), (250, 102880), (320, 80375), (400, 64300), (500, 51440), (625, 41152), (643, 40000), (800, 32150), (1000, 25720), (1250, 20576), (1286, 20000), (1600, 16075), (2000, 12860), (2500, 10288), (2572, 10000), (3215, 8000), (4000, 6430), (5000, 5144)]