20199800

素因数分解:

$2^3\times 5^2\times {\mathrm{100999}}^1$

素因数の和:101015

約数の個数: 24

約数和(自身を含む): 46965000

約数和(自身を除く): 26765200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 100999, 201998, 403996, 504995, 807992, 1009990, 2019980, 2524975, 4039960, 5049950, 10099900, 20199800]

約数ペア:

[(1, 20199800), (2, 10099900), (4, 5049950), (5, 4039960), (8, 2524975), (10, 2019980), (20, 1009990), (25, 807992), (40, 504995), (50, 403996), (100, 201998), (200, 100999)]