20991500

素因数分解:

$2^2\times 5^3\times {\mathrm{41983}}^1$

素因数の和:42002

約数の個数: 24

約数和(自身を含む): 45846528

約数和(自身を除く): 24855028

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 41983, 83966, 167932, 209915, 419830, 839660, 1049575, 2099150, 4198300, 5247875, 10495750, 20991500]

約数ペア:

[(1, 20991500), (2, 10495750), (4, 5247875), (5, 4198300), (10, 2099150), (20, 1049575), (25, 839660), (50, 419830), (100, 209915), (125, 167932), (250, 83966), (500, 41983)]