21608940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{2591}}^1$

素因数の和:2742

約数の個数: 48

約数和(自身を含む): 60963840

約数和(自身を除く): 39354900

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 139, 278, 417, 556, 695, 834, 1390, 1668, 2085, 2591, 2780, 4170, 5182, 7773, 8340, 10364, 12955, 15546, 25910, 31092, 38865, 51820, 77730, 155460, 360149, 720298, 1080447, 1440596, 1800745, 2160894, 3601490, 4321788, 5402235, 7202980, 10804470, 21608940]

約数ペア:

[(1, 21608940), (2, 10804470), (3, 7202980), (4, 5402235), (5, 4321788), (6, 3601490), (10, 2160894), (12, 1800745), (15, 1440596), (20, 1080447), (30, 720298), (60, 360149), (139, 155460), (278, 77730), (417, 51820), (556, 38865), (695, 31092), (834, 25910), (1390, 15546), (1668, 12955), (2085, 10364), (2591, 8340), (2780, 7773), (4170, 5182)]