31120720

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{5479}}^1$

素因数の和:5563

約数の個数: 40

約数和(自身を含む): 73388160

約数和(自身を除く): 42267440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 5479, 5680, 10958, 21916, 27395, 43832, 54790, 87664, 109580, 219160, 389009, 438320, 778018, 1556036, 1945045, 3112072, 3890090, 6224144, 7780180, 15560360, 31120720]

約数ペア:

[(1, 31120720), (2, 15560360), (4, 7780180), (5, 6224144), (8, 3890090), (10, 3112072), (16, 1945045), (20, 1556036), (40, 778018), (71, 438320), (80, 389009), (142, 219160), (284, 109580), (355, 87664), (568, 54790), (710, 43832), (1136, 27395), (1420, 21916), (2840, 10958), (5479, 5680)]