21438500

素因数分解:

$2^2\times 5^3\times {\mathrm{53}}^1\times {\mathrm{809}}^1$

素因数の和:881

約数の個数: 48

約数和(自身を含む): 47764080

約数和(自身を除く): 26325580

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 53, 100, 106, 125, 212, 250, 265, 500, 530, 809, 1060, 1325, 1618, 2650, 3236, 4045, 5300, 6625, 8090, 13250, 16180, 20225, 26500, 40450, 42877, 80900, 85754, 101125, 171508, 202250, 214385, 404500, 428770, 857540, 1071925, 2143850, 4287700, 5359625, 10719250, 21438500]

約数ペア:

[(1, 21438500), (2, 10719250), (4, 5359625), (5, 4287700), (10, 2143850), (20, 1071925), (25, 857540), (50, 428770), (53, 404500), (100, 214385), (106, 202250), (125, 171508), (212, 101125), (250, 85754), (265, 80900), (500, 42877), (530, 40450), (809, 26500), (1060, 20225), (1325, 16180), (1618, 13250), (2650, 8090), (3236, 6625), (4045, 5300)]