78480400

素因数分解:

$2^4\times 5^2\times {\mathrm{196201}}^1$

素因数の和:196219

約数の個数: 30

約数和(自身を含む): 188550122

約数和(自身を除く): 110069722

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 196201, 392402, 784804, 981005, 1569608, 1962010, 3139216, 3924020, 4905025, 7848040, 9810050, 15696080, 19620100, 39240200, 78480400]

約数ペア:

[(1, 78480400), (2, 39240200), (4, 19620100), (5, 15696080), (8, 9810050), (10, 7848040), (16, 4905025), (20, 3924020), (25, 3139216), (40, 1962010), (50, 1569608), (80, 981005), (100, 784804), (200, 392402), (400, 196201)]