891980

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{433}}^1$

素因数の和:545

約数の個数: 24

約数和(自身を含む): 1895712

約数和(自身を除く): 1003732

約数列:

[1, 2, 4, 5, 10, 20, 103, 206, 412, 433, 515, 866, 1030, 1732, 2060, 2165, 4330, 8660, 44599, 89198, 178396, 222995, 445990, 891980]

約数ペア:

[(1, 891980), (2, 445990), (4, 222995), (5, 178396), (10, 89198), (20, 44599), (103, 8660), (206, 4330), (412, 2165), (433, 2060), (515, 1732), (866, 1030)]