1980800

素因数分解:

$2^7\times 5^2\times {\mathrm{619}}^1$

素因数の和:643

約数の個数: 48

約数和(自身を含む): 4901100

約数和(自身を除く): 2920300

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 320, 400, 619, 640, 800, 1238, 1600, 2476, 3095, 3200, 4952, 6190, 9904, 12380, 15475, 19808, 24760, 30950, 39616, 49520, 61900, 79232, 99040, 123800, 198080, 247600, 396160, 495200, 990400, 1980800]

約数ペア:

[(1, 1980800), (2, 990400), (4, 495200), (5, 396160), (8, 247600), (10, 198080), (16, 123800), (20, 99040), (25, 79232), (32, 61900), (40, 49520), (50, 39616), (64, 30950), (80, 24760), (100, 19808), (128, 15475), (160, 12380), (200, 9904), (320, 6190), (400, 4952), (619, 3200), (640, 3095), (800, 2476), (1238, 1600)]