20638400

素因数分解:

$2^6\times 5^2\times {\mathrm{12899}}^1$

素因数の和:12921

約数の個数: 42

約数和(自身を含む): 50787300

約数和(自身を除く): 30148900

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 12899, 25798, 51596, 64495, 103192, 128990, 206384, 257980, 322475, 412768, 515960, 644950, 825536, 1031920, 1289900, 2063840, 2579800, 4127680, 5159600, 10319200, 20638400]

約数ペア:

[(1, 20638400), (2, 10319200), (4, 5159600), (5, 4127680), (8, 2579800), (10, 2063840), (16, 1289900), (20, 1031920), (25, 825536), (32, 644950), (40, 515960), (50, 412768), (64, 322475), (80, 257980), (100, 206384), (160, 128990), (200, 103192), (320, 64495), (400, 51596), (800, 25798), (1600, 12899)]