128359600

素因数分解:

$2^4\times 5^2\times {\mathrm{320899}}^1$

素因数の和:320917

約数の個数: 30

約数和(自身を含む): 308384900

約数和(自身を除く): 180025300

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 320899, 641798, 1283596, 1604495, 2567192, 3208990, 5134384, 6417980, 8022475, 12835960, 16044950, 25671920, 32089900, 64179800, 128359600]

約数ペア:

[(1, 128359600), (2, 64179800), (4, 32089900), (5, 25671920), (8, 16044950), (10, 12835960), (16, 8022475), (20, 6417980), (25, 5134384), (40, 3208990), (50, 2567192), (80, 1604495), (100, 1283596), (200, 641798), (400, 320899)]