123456400

素因数分解:

$2^4\times 5^2\times {\mathrm{308641}}^1$

素因数の和:308659

約数の個数: 30

約数和(自身を含む): 296604962

約数和(自身を除く): 173148562

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 308641, 617282, 1234564, 1543205, 2469128, 3086410, 4938256, 6172820, 7716025, 12345640, 15432050, 24691280, 30864100, 61728200, 123456400]

約数ペア:

[(1, 123456400), (2, 61728200), (4, 30864100), (5, 24691280), (8, 15432050), (10, 12345640), (16, 7716025), (20, 6172820), (25, 4938256), (40, 3086410), (50, 2469128), (80, 1543205), (100, 1234564), (200, 617282), (400, 308641)]