2880040

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{809}}^1$

素因数の和:909

約数の個数: 32

約数和(自身を含む): 6561000

約数和(自身を除く): 3680960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 809, 890, 1618, 1780, 3236, 3560, 4045, 6472, 8090, 16180, 32360, 72001, 144002, 288004, 360005, 576008, 720010, 1440020, 2880040]

約数ペア:

[(1, 2880040), (2, 1440020), (4, 720010), (5, 576008), (8, 360005), (10, 288004), (20, 144002), (40, 72001), (89, 32360), (178, 16180), (356, 8090), (445, 6472), (712, 4045), (809, 3560), (890, 3236), (1618, 1780)]