1721000720

素因数分解:

$2^4\times 5^1\times {\mathrm{21512509}}^1$

素因数の和:21512522

約数の個数: 20

約数和(自身を含む): 4001326860

約数和(自身を除く): 2280326140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 21512509, 43025018, 86050036, 107562545, 172100072, 215125090, 344200144, 430250180, 860500360, 1721000720]

約数ペア:

[(1, 1721000720), (2, 860500360), (4, 430250180), (5, 344200144), (8, 215125090), (10, 172100072), (16, 107562545), (20, 86050036), (40, 43025018), (80, 21512509)]