20510080

素因数分解:

$2^7\times 5^1\times {\mathrm{73}}^1\times {\mathrm{439}}^1$

素因数の和:531

約数の個数: 64

約数和(自身を含む): 49816800

約数和(自身を除く): 29306720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 73, 80, 128, 146, 160, 292, 320, 365, 439, 584, 640, 730, 878, 1168, 1460, 1756, 2195, 2336, 2920, 3512, 4390, 4672, 5840, 7024, 8780, 9344, 11680, 14048, 17560, 23360, 28096, 32047, 35120, 46720, 56192, 64094, 70240, 128188, 140480, 160235, 256376, 280960, 320470, 512752, 640940, 1025504, 1281880, 2051008, 2563760, 4102016, 5127520, 10255040, 20510080]

約数ペア:

[(1, 20510080), (2, 10255040), (4, 5127520), (5, 4102016), (8, 2563760), (10, 2051008), (16, 1281880), (20, 1025504), (32, 640940), (40, 512752), (64, 320470), (73, 280960), (80, 256376), (128, 160235), (146, 140480), (160, 128188), (292, 70240), (320, 64094), (365, 56192), (439, 46720), (584, 35120), (640, 32047), (730, 28096), (878, 23360), (1168, 17560), (1460, 14048), (1756, 11680), (2195, 9344), (2336, 8780), (2920, 7024), (3512, 5840), (4390, 4672)]