28699780

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{7211}}^1$

素因数の和:7419

約数の個数: 24

約数和(自身を含む): 60580800

約数和(自身を除く): 31881020

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 7211, 14422, 28844, 36055, 72110, 144220, 1434989, 2869978, 5739956, 7174945, 14349890, 28699780]

約数ペア:

[(1, 28699780), (2, 14349890), (4, 7174945), (5, 5739956), (10, 2869978), (20, 1434989), (199, 144220), (398, 72110), (796, 36055), (995, 28844), (1990, 14422), (3980, 7211)]