40784000

素因数分解:

$2^7\times 5^3\times {\mathrm{2549}}^1$

素因数の和:2578

約数の個数: 64

約数和(自身を含む): 101439000

約数和(自身を除く): 60655000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 500, 640, 800, 1000, 1600, 2000, 2549, 3200, 4000, 5098, 8000, 10196, 12745, 16000, 20392, 25490, 40784, 50980, 63725, 81568, 101960, 127450, 163136, 203920, 254900, 318625, 326272, 407840, 509800, 637250, 815680, 1019600, 1274500, 1631360, 2039200, 2549000, 4078400, 5098000, 8156800, 10196000, 20392000, 40784000]

約数ペア:

[(1, 40784000), (2, 20392000), (4, 10196000), (5, 8156800), (8, 5098000), (10, 4078400), (16, 2549000), (20, 2039200), (25, 1631360), (32, 1274500), (40, 1019600), (50, 815680), (64, 637250), (80, 509800), (100, 407840), (125, 326272), (128, 318625), (160, 254900), (200, 203920), (250, 163136), (320, 127450), (400, 101960), (500, 81568), (640, 63725), (800, 50980), (1000, 40784), (1600, 25490), (2000, 20392), (2549, 16000), (3200, 12745), (4000, 10196), (5098, 8000)]