20428400

素因数分解:

$2^4\times 5^2\times {\mathrm{51071}}^1$

素因数の和:51089

約数の個数: 30

約数和(自身を含む): 49080192

約数和(自身を除く): 28651792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51071, 102142, 204284, 255355, 408568, 510710, 817136, 1021420, 1276775, 2042840, 2553550, 4085680, 5107100, 10214200, 20428400]

約数ペア:

[(1, 20428400), (2, 10214200), (4, 5107100), (5, 4085680), (8, 2553550), (10, 2042840), (16, 1276775), (20, 1021420), (25, 817136), (40, 510710), (50, 408568), (80, 255355), (100, 204284), (200, 102142), (400, 51071)]