21188240

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{3191}}^1$

素因数の和:3287

約数の個数: 40

約数和(自身を含む): 49871808

約数和(自身を除く): 28683568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 830, 1328, 1660, 3191, 3320, 6382, 6640, 12764, 15955, 25528, 31910, 51056, 63820, 127640, 255280, 264853, 529706, 1059412, 1324265, 2118824, 2648530, 4237648, 5297060, 10594120, 21188240]

約数ペア:

[(1, 21188240), (2, 10594120), (4, 5297060), (5, 4237648), (8, 2648530), (10, 2118824), (16, 1324265), (20, 1059412), (40, 529706), (80, 264853), (83, 255280), (166, 127640), (332, 63820), (415, 51056), (664, 31910), (830, 25528), (1328, 15955), (1660, 12764), (3191, 6640), (3320, 6382)]