20454560

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{2609}}^1$

素因数の和:2638

約数の個数: 72

約数和(自身を含む): 56235060

約数和(自身を除く): 35780500

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 2609, 3920, 5218, 7840, 10436, 13045, 18263, 20872, 26090, 36526, 41744, 52180, 73052, 83488, 91315, 104360, 127841, 146104, 182630, 208720, 255682, 292208, 365260, 417440, 511364, 584416, 639205, 730520, 1022728, 1278410, 1461040, 2045456, 2556820, 2922080, 4090912, 5113640, 10227280, 20454560]

約数ペア:

[(1, 20454560), (2, 10227280), (4, 5113640), (5, 4090912), (7, 2922080), (8, 2556820), (10, 2045456), (14, 1461040), (16, 1278410), (20, 1022728), (28, 730520), (32, 639205), (35, 584416), (40, 511364), (49, 417440), (56, 365260), (70, 292208), (80, 255682), (98, 208720), (112, 182630), (140, 146104), (160, 127841), (196, 104360), (224, 91315), (245, 83488), (280, 73052), (392, 52180), (490, 41744), (560, 36526), (784, 26090), (980, 20872), (1120, 18263), (1568, 13045), (1960, 10436), (2609, 7840), (3920, 5218)]