7999900

素因数分解:

$2^2\times 5^2\times {\mathrm{79999}}^1$

素因数の和:80013

約数の個数: 18

約数和(自身を含む): 17360000

約数和(自身を除く): 9360100

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 79999, 159998, 319996, 399995, 799990, 1599980, 1999975, 3999950, 7999900]

約数ペア:

[(1, 7999900), (2, 3999950), (4, 1999975), (5, 1599980), (10, 799990), (20, 399995), (25, 319996), (50, 159998), (100, 79999)]