20128400

素因数分解:

$2^4\times 5^2\times {\mathrm{50321}}^1$

素因数の和:50339

約数の個数: 30

約数和(自身を含む): 48359442

約数和(自身を除く): 28231042

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 50321, 100642, 201284, 251605, 402568, 503210, 805136, 1006420, 1258025, 2012840, 2516050, 4025680, 5032100, 10064200, 20128400]

約数ペア:

[(1, 20128400), (2, 10064200), (4, 5032100), (5, 4025680), (8, 2516050), (10, 2012840), (16, 1258025), (20, 1006420), (25, 805136), (40, 503210), (50, 402568), (80, 251605), (100, 201284), (200, 100642), (400, 50321)]