20646400

素因数分解:

$2^9\times 5^2\times {\mathrm{1613}}^1$

素因数の和:1641

約数の個数: 60

約数和(自身を含む): 51184782

約数和(自身を除く): 30538382

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 800, 1280, 1600, 1613, 2560, 3200, 3226, 6400, 6452, 8065, 12800, 12904, 16130, 25808, 32260, 40325, 51616, 64520, 80650, 103232, 129040, 161300, 206464, 258080, 322600, 412928, 516160, 645200, 825856, 1032320, 1290400, 2064640, 2580800, 4129280, 5161600, 10323200, 20646400]

約数ペア:

[(1, 20646400), (2, 10323200), (4, 5161600), (5, 4129280), (8, 2580800), (10, 2064640), (16, 1290400), (20, 1032320), (25, 825856), (32, 645200), (40, 516160), (50, 412928), (64, 322600), (80, 258080), (100, 206464), (128, 161300), (160, 129040), (200, 103232), (256, 80650), (320, 64520), (400, 51616), (512, 40325), (640, 32260), (800, 25808), (1280, 16130), (1600, 12904), (1613, 12800), (2560, 8065), (3200, 6452), (3226, 6400)]