8720560

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1787}}^1$

素因数の和:1861

約数の個数: 40

約数和(自身を含む): 20619216

約数和(自身を除く): 11898656

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 1787, 2440, 3574, 4880, 7148, 8935, 14296, 17870, 28592, 35740, 71480, 109007, 142960, 218014, 436028, 545035, 872056, 1090070, 1744112, 2180140, 4360280, 8720560]

約数ペア:

[(1, 8720560), (2, 4360280), (4, 2180140), (5, 1744112), (8, 1090070), (10, 872056), (16, 545035), (20, 436028), (40, 218014), (61, 142960), (80, 109007), (122, 71480), (244, 35740), (305, 28592), (488, 17870), (610, 14296), (976, 8935), (1220, 7148), (1787, 4880), (2440, 3574)]