128116400

素因数分解:

$2^4\times 5^2\times {\mathrm{320291}}^1$

素因数の和:320309

約数の個数: 30

約数和(自身を含む): 307800612

約数和(自身を除く): 179684212

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 320291, 640582, 1281164, 1601455, 2562328, 3202910, 5124656, 6405820, 8007275, 12811640, 16014550, 25623280, 32029100, 64058200, 128116400]

約数ペア:

[(1, 128116400), (2, 64058200), (4, 32029100), (5, 25623280), (8, 16014550), (10, 12811640), (16, 8007275), (20, 6405820), (25, 5124656), (40, 3202910), (50, 2562328), (80, 1601455), (100, 1281164), (200, 640582), (400, 320291)]