990400

素因数分解:

$2^6\times 5^2\times {\mathrm{619}}^1$

素因数の和:641

約数の個数: 42

約数和(自身を含む): 2440940

約数和(自身を除く): 1450540

約数列:

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

約数ペア:

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