78516400

素因数分解:

$2^4\times 5^2\times {\mathrm{196291}}^1$

素因数の和:196309

約数の個数: 30

約数和(自身を含む): 188636612

約数和(自身を除く): 110120212

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 196291, 392582, 785164, 981455, 1570328, 1962910, 3140656, 3925820, 4907275, 7851640, 9814550, 15703280, 19629100, 39258200, 78516400]

約数ペア:

[(1, 78516400), (2, 39258200), (4, 19629100), (5, 15703280), (8, 9814550), (10, 7851640), (16, 4907275), (20, 3925820), (25, 3140656), (40, 1962910), (50, 1570328), (80, 981455), (100, 785164), (200, 392582), (400, 196291)]