7996400

素因数分解:

$2^4\times 5^2\times {\mathrm{19991}}^1$

素因数の和:20009

約数の個数: 30

約数和(自身を含む): 19212312

約数和(自身を除く): 11215912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 19991, 39982, 79964, 99955, 159928, 199910, 319856, 399820, 499775, 799640, 999550, 1599280, 1999100, 3998200, 7996400]

約数ペア:

[(1, 7996400), (2, 3998200), (4, 1999100), (5, 1599280), (8, 999550), (10, 799640), (16, 499775), (20, 399820), (25, 319856), (40, 199910), (50, 159928), (80, 99955), (100, 79964), (200, 39982), (400, 19991)]