20648560

素因数分解:

$2^4\times 5^1\times {\mathrm{258107}}^1$

素因数の和:258120

約数の個数: 20

約数和(自身を含む): 48008088

約数和(自身を除く): 27359528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258107, 516214, 1032428, 1290535, 2064856, 2581070, 4129712, 5162140, 10324280, 20648560]

約数ペア:

[(1, 20648560), (2, 10324280), (4, 5162140), (5, 4129712), (8, 2581070), (10, 2064856), (16, 1290535), (20, 1032428), (40, 516214), (80, 258107)]