21163760

素因数分解:

$2^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{1931}}^1$

素因数の和:2081

約数の個数: 40

約数和(自身を含む): 49590576

約数和(自身を除く): 28426816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 137, 274, 548, 685, 1096, 1370, 1931, 2192, 2740, 3862, 5480, 7724, 9655, 10960, 15448, 19310, 30896, 38620, 77240, 154480, 264547, 529094, 1058188, 1322735, 2116376, 2645470, 4232752, 5290940, 10581880, 21163760]

約数ペア:

[(1, 21163760), (2, 10581880), (4, 5290940), (5, 4232752), (8, 2645470), (10, 2116376), (16, 1322735), (20, 1058188), (40, 529094), (80, 264547), (137, 154480), (274, 77240), (548, 38620), (685, 30896), (1096, 19310), (1370, 15448), (1931, 10960), (2192, 9655), (2740, 7724), (3862, 5480)]