7998400

素因数分解:

$2^6\times 5^2\times {\mathrm{4999}}^1$

素因数の和:5021

約数の個数: 42

約数和(自身を含む): 19685000

約数和(自身を除く): 11686600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 4999, 9998, 19996, 24995, 39992, 49990, 79984, 99980, 124975, 159968, 199960, 249950, 319936, 399920, 499900, 799840, 999800, 1599680, 1999600, 3999200, 7998400]

約数ペア:

[(1, 7998400), (2, 3999200), (4, 1999600), (5, 1599680), (8, 999800), (10, 799840), (16, 499900), (20, 399920), (25, 319936), (32, 249950), (40, 199960), (50, 159968), (64, 124975), (80, 99980), (100, 79984), (160, 49990), (200, 39992), (320, 24995), (400, 19996), (800, 9998), (1600, 4999)]