21804740

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{5167}}^1$

素因数の和:5387

約数の個数: 24

約数和(自身を含む): 46015872

約数和(自身を除く): 24211132

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 5167, 10334, 20668, 25835, 51670, 103340, 1090237, 2180474, 4360948, 5451185, 10902370, 21804740]

約数ペア:

[(1, 21804740), (2, 10902370), (4, 5451185), (5, 4360948), (10, 2180474), (20, 1090237), (211, 103340), (422, 51670), (844, 25835), (1055, 20668), (2110, 10334), (4220, 5167)]