28840400

素因数分解:

$2^4\times 5^2\times {\mathrm{72101}}^1$

素因数の和:72119

約数の個数: 30

約数和(自身を含む): 69290022

約数和(自身を除く): 40449622

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 72101, 144202, 288404, 360505, 576808, 721010, 1153616, 1442020, 1802525, 2884040, 3605050, 5768080, 7210100, 14420200, 28840400]

約数ペア:

[(1, 28840400), (2, 14420200), (4, 7210100), (5, 5768080), (8, 3605050), (10, 2884040), (16, 1802525), (20, 1442020), (25, 1153616), (40, 721010), (50, 576808), (80, 360505), (100, 288404), (200, 144202), (400, 72101)]